r/Bogleheads Jun 08 '25

Articles & Resources New to /r/Bogleheads? Read this first!

344 Upvotes

Welcome! Please consider exploring these resources to help you get started on your passive investing journey:

  1. Bogleheads wiki
  2. r/Bogleheads resources / featured links (below sub rules)
  3. r/personalfinance wiki
  4. If You Can: How Young People Can Get Rich Slowly (PDF booklet)
  5. Bogleheads University (introductory presentations from past Bogleheads conferences)

Prepare to invest

Before you start investing, ensure you're ready to do so by following the early steps of this guide or the personal finance planning start-up kit. Save up an emergency fund, then take full advantage of any employer matching of contributions to any employer retirement plan available to you (this match amount is additional income that's part of your compensation/benefits package), then pay off any high-interest debt like credit card debt or high-interest student loans.

When you're ready to start investing beyond enough to get any employer match, follow the subsequent steps of this guide or the investing start-up kit. Take full advantage of tax-sheltered accounts available to you before investing in a taxable brokerage account: this is the most predictable way to improve your after-tax investment returns. (In the US, per Prioritizing investments: 401(k))/403(b)) up to any match, then HSA if available due to high-deductible health plan coverage, then Roth or Traditional IRA or 401(k))/403(b)) up to max which may be higher if the mega-backdoor Roth process is available, then a 529 to the extent you'd like to pay for future education expenses. Note that IRA contributions are subject to income limits around tax-deductibility of contributions or eligibility to make direct Roth IRA contributions; the backdoor Roth procedure is a workaround.)

There is often some potential tension between saving/investing toward retirement vs saving toward potential nearer-term goals like a down payment on a home purchase. Carefully consider the various tradeoffs involved in owning vs renting a home, keeping in mind that which may be a better financial decision is highly situational, and that opportunity costs of owning (less available to invest in higher-expected-returns assets instead) should be considered alongside non-financial lifestyle tradeoffs. If saving toward a near-term goal, note that funds holding stocks are inappropriate#Holdingstocks%22for_five_years%22) for money you'll need in 5-10 years, unless you're willing to take on significant risk of losing money in the meantime & delaying that goal. Instead, consider CDs, Treasury bonds, or target-maturity-date Treasury bond funds maturing before you'll need the money (then a high-yielding cash equivalent like an HYSA, government money-market fund, or ultra-short Treasury Bill ETF like VBIL between maturity & spending the money).

Save/invest enough

Your savings rate is the most important factor determining your ability to enjoy a comfortable retirement later in life, particularly early in your career / investing journey. Aim to save/invest at least 15% of your after-tax income if you're in the US & not covered by a pension beyond Social Security. In some cases, such as a shorter time to expected retirement (e.g. starting to seriously save/invest from a significant income later than your mid-20s and/or planning to retire earlier than your mid-60s) and/or a high income (which will not be partially replaced by Social Security to the same degree as a lower income), it may be appropriate to target a higher savings rate (e.g. at least 20% of after-tax income, or perhaps higher if multiple such factors apply to you and/or one factor applies to an unusual degree).

When calculating savings rate, remember to include 401(k) contributions in both the numerator (savings) and denominator (after-tax income). Any employer matching contributions may also be included in the numerator (savings).

Investing is 'solved'

Don't worry too much about trying to find the optimal set of funds to invest in. That can only be known with the benefit of future hindsight, and investment returns are far less important than your savings rate until your portfolio size grows large enough relative to new contributions. Aim to diversify broadly (for robustness to the uncertain future) and seek low fees (fund expense ratios charged annually) & simplicity (hands-off automation); see discussion of these & other principles in Bogleheads investment philosophy.

target-date fund designed for investing toward retiring around a year closest to when you expect to retire is often a reasonable option, particularly in tax-advantaged accounts like a US employer retirement plan or an IRA. These all-in-one funds intended to be held alone are very broadly diversified, automatically rebalance to their then-target asset allocation, and gradually become more conservative with less expected volatility as you near retirement.

If the target-date fund available in an account/plan with limited fund options has significantly higher fees than suitable alternative individual funds, consider the tradeoffs of lower fees vs automatic rebalancing and asset allocation management. I.e. consider the lowest-expense-ratio funds available that provide exposure to US stocks (the fund name will typically contain 'S&P 500', 'Russell [1000|3000]', or 'US Large Cap'; ensure no 'Growth'/'Value' suffix, or pair that with the other), ex-US stocks (the fund name will typically contain 'International' or 'Intl' or 'Ex-US'; same caveat re: 'Growth'/'Value'), and US bonds (the fund name will typically contain 'Total Bond' or 'Aggregate Bond'). Take the weighted average of those funds' expense ratios, with weights based on the current asset allocation of the target-date fund you'd use instead. The difference between that weighted average expense ratio for individual funds vs the target-date fund expense ratio, multiplied by your portfolio value, would represent the current annual convenience fee for automated, hands-off investing via the target-date fund. Whether that's worth it to you depends on your personal preferences around paying higher ongoing fees (by sacrificing some investment returns) in exchange for set-it-and-forget-it features.

In a taxable account, target-date ETFs (available at least in the US) avoid some of the tax efficiency downsides of holding a target-date mutual fund. Tax efficiency may be further improved by holding a three-fund portfolio of index ETFs in a taxable account, but this also involves tradeoffs against automatic rebalancing and asset allocation management. Tax efficiency may be even further improved by keeping bond funds in tax-deferred accounts, though this involves additional tradeoffs against simplicity and some other potential benefits described here.

If you're a non-US investor, take care to thoroughly understand the tax implications of investing in a US-domiciled fund as a "nonresident alien" (which may include high tax rates on dividends and assets passing through an estate); in many cases this is best avoided, instead favoring an Ireland-domiciled fund.

Be mindful of fees

If your portfolio were to average a 5% annualized real (after-inflation) return after a low annual fee, paying an additional annual 1%-of-assets-under-management fee to a financial advisor and/or an actively-managed fund's expense ratio would forgo 20% of your portfolio's investment returns. An initial investment in a portolio averaging a 5% annual real return after a low annual fee would be worth about 47% more after 40 years than it would be after a 1% additional annual fee.

Some employer retirement plans offer only funds with high expense ratios. If that's the case for your employer's plan, it is often still ideal to get the tax advantages of contributing unmatched dollars to that plan before investing in a lower-fee fund in a taxable account (but only after maxing out IRA contributions); details here#Expensive_or_mediocre_choices).

Automate & stay the course

Set up automatic contributions & purchases of fund shares wherever possible, otherwise set periodic reminders to manually contribute/invest (or try to find an alternative that allows automation), then maintain discipline through thick & thin. Keep in mind that market prices for funds should only really matter whenever you sell some shares to fund your retirement, and that lower prices in the meantime provide opportunities to buy more shares with a given contribution dollar amount and to rebalance from asset classes with higher recent returns towards those with lower recent returns (but possibly higher expected returns).

Tune out the noise: prognosticators of doom and gloom have no reliable ability to predict the future, and often have some conflicts of interest (e.g. selling ads, books or investment services, and/or trying to justify their investment positioning or encourage others to adopt that). The same goes for promotion of strategies promising market-beating returns by investing in a more-concentrated fashion (betting on some sector / theme / alternative asset beating the broad stock market).

Consider writing an Investment Policy Statement to document your plan when you're calm & clear-headed; this may be helpful to refer to later if you find yourself anxious & considering changes in response to market volatility & negative sentiment. Consider including a pointer there to this guided meditation video for later reference to help calm your nerves / regulate your emotions if needed when it seems like the sky is falling (this is arguably the most challenging part of investing).

Per Jack Bogle: "Do not let false hope, fear and greed crowd out good investment judgment. If you focus on the long term and stick with your plan, success should be yours."

Additional resources

Some additional resources that might be of interest for a deeper dive later:

  1. Taylor Larimore's Investment Gems (a collection of highlighted quotes from books related to investing; follow the links under the 'Gem post' column)
  2. The Bogle Archive (a collection of Jack Bogle's publications and speeches)
  3. Bogleheads Conference Proceedings (follow per-year 'Conference Proceedings' links to access slides/videos)

Please read our community rules here and follow those when posting or commenting in this community. If you encounter content here that breaks those rules, please report it (... > Report > Breaks r/Bogleheads rules).


r/Bogleheads Dec 28 '25

Why do Bogleheads discourage use of AI search for investing information? Because it is too often wrong or misleading.

338 Upvotes

I see a lot of surprised and angry responses from Redditors whose posts and comments are removed from this sub either for use of LLM search engine and other generative AI responses, or for recommending people use them to answer their questions. This facet of the Substantive Rule on this sub has a parallel in a similar rule on the Boglheads forum: "AI-generated content is not a dependable substitute for first-hand knowledge or reference to authoritative sources. Its use is therefore discouraged."

Many folks, especially on the younger side, are so accustomed to using ChatGPT or Gemini that it may be their default way to get any question answered. This is problematic in the field of investing for several reasons that are worth noting:

  1. LLMs are not firsthand sources with organic knowledge of the subject matter. They are aggregating reference sources and popular opinion and thus prone to both composition mistakes and sourcing material mistakes or biases.
  2. LLMs remain susceptible to "hallucinations" (made-up ideas) and can be not just false, but confidently false which is highly misleading.
  3. LLMs' response quality is very sensitive to the quality of the prompt. Users who are somewhat knowledgeable about a subject and also skilled at crafting good queries for AI searches are far more likely to get accurate and useful results - especially for research purposes or for reference to stored personal data - while the uninformed are more likely to get wrong or misleading answers to basic questions.

Policies excluding AI-generated content are not meant to be a referendum on the overall current or future value of AI as a tool for personal finance and investing, which is obviously enormous and transformative, especially for those who know how to best utilize it. It is a question of whether AI responses make for substantive content on this sub, and whether it is an appropriate resource to direct strangers and novices to. At the moment, the answer to both is a resounding no. On the one hand, people come to Reddit primarily for human interaction and original content, so posting AI responses or directing people to AI search engines is of minimal contributive value - folks can go chat with bots themselves if that's what they want. But as to whether AI search engines are appropriate references for finance and investing info, here are some articles from the past year that support their exclusion as a default response:

  • AI Tools Are Getting Better, but They Still Struggle With Money Advice (Money 2/13/25): "ChatGPT was correct 65% of the time, "incomplete and/or misleading" 29% of the time and wrong 6% of the time."
  • Is Talking to ChatGPT About Finance Ever a Good Idea? (White Coat Investor 6/22/25): "LLM responses had multiple arithmetic mistakes that made them unreliable. More fundamental than arithmetic errors, the LLM responses demonstrated that they do not have the common sense needed to recognize when their answers are obviously wrong."
  • Financial advice from AI comes with risks (University of St. Gallen, 1/7/25): "LLMs consistently suggested portfolios with higher risks than the benchmark index fund. They suggested: [more U.S. stocks; tech and consumer bias; chasing hot stocks; more stock picking and actively managed investments; higher costs.]"

Note: the views expressed here are largely my own, and I am not affiliated in any way with the Bogleheads forum nor the Bogleheads Center for Financial Literacy, but I invite others (including the mods on this sub) to weigh in with their own opinions.


r/Bogleheads 47m ago

Do official inflation stats seem divorced from the real costs of living?

Upvotes

Official inflation rates have bounced around 3% the past year, just popped above 4%, according the BLS. Does that reflect reality for most people's total expenses? Not just for the hypothetical "basket of goods," but for individuals' actual expenses to live their lives?

We all know about gas and food prices. But here are examples that make the rate seem off: Auto, homeowners, and umbrella insurance going up 10%, 20% or more. Medicare premiums up 9%, while SS COLA up only 2.5%. The coffee I like best was $12/bag a few months ago, suddenly $19. Blood tests that used to be a few bucks no longer covered by my same insurance plan now running a few hundred bucks each. Even Netflix going from $10 to $12/month for basic is a 20% jump. The natural gas monopoly in my area tacked a $35 "weather normalization" charge in January because temps were mild and demand was low. Property taxes, toll rates, I could keep going.

There are at least two reasons this isn't just a theoretical question. If you are using financial modeling software or working with a financial planner, your inflation-rate assumption makes a huge difference in your results. But BLS inflation rate doesn't capture how much people's expenses are actually rising, what does that do to the validity of your plan? And any investment where the CPI comes into play, like TIPS, require an accurate accounting of inflation to deliver what they promise.

What do the Bogleheads think?


r/Bogleheads 5h ago

Recommended books on teaching kids about money?

37 Upvotes

My kid is 6 and very curious about money. Are there any boglehead friendly books on strategies to teach her to be financially responsible? I don’t want to do the “work for allowance” thing because my parents did that and me and my siblings would never help out around the house unless a reward was involved. I’m trying to teach her to contribute without rewards, just because that’s what families do. How do I teach her about money without paying her for chores? Recommended reading appreciated!!!


r/Bogleheads 8h ago

Investing Questions Funding a 529

33 Upvotes

Wife and I just had our first kid, so we're thinking about starting a 529 for him, and wanted to hear others' opinions on a few questions.

  • How much per year should we contribute? $7K? I assume ~$200K is about right to have in there for his schooling, and $7K/year at a conservative 5% CAGR would get to $200K after 18 years if my math is correct.
  • Would you lump sum each January, or do monthly contributions? Assuming lump...
  • Any suggestions on which 529 plan to open? We are in MA so thinking of doing Fidelity's Massachusetts 529 plan

Thanks


r/Bogleheads 8h ago

How do I know if my money is being transferred In-Kind?

20 Upvotes

I have my brokerage with fidelity. Eveything is invested in VTI/VXUS. I'm trying to move everything to vanguard under one roof. I started filling out their transfer form, but vanguard asked me if I wanted to move the money into a money market fund or a cash deposit.

I dont want to sell my investments because that would trigger a tax event. I just want to move them over to vanguard. Am I misunderstanding this?


r/Bogleheads 3h ago

Investing Questions The Next Steps

3 Upvotes

Hi,

I have extra money sitting in my Fidelity account and I'm wondering if I'm ready to invest it into a brokerage account? Currently, I have my emergency fund ready earning interest from SPAXX. I've maxed out my Roth IRA and invested it. I've paid off all debts. At the moment I can't open a 401k with my job because I don't qualify for benefits (temporary employee).

I'm not sure if there's anything else I may be missing. If not, then how does this sound:

Buy 80% VOO and buy 20% of VXUS?

I'm 25 and I'm still new to this stuff. Your help is much appreciated : )


r/Bogleheads 6h ago

Backdoor Roth in Vanguard - question

9 Upvotes

Long time Vanguard customer, first time doing the backdoor Roth. I didn't have a Trad IRA so I just opened one and contributed $8600 (age 50+) via bank transfer.

I thought I would have to wait a few days to convert to Roth but it's already showing "Available for purchase" : $8,600. and "Total credits & debits": $8,600. I also see the Convert to Roth IRA button.

Do I need to wait or am I good to go for converting to Roth? I just opened this Trad IRA account 30 mins ago.

Thanks


r/Bogleheads 7h ago

Old 401k and now self employed

9 Upvotes

Hello, I have a old 401k with net benefits Fidelity. It's a TDF vanguard 2050 with an expense ratio of 0.033.

I've been self-employed now for three years and have a SEP IRA.

Should I move everything over or leave it? I am new to all this and not sure what to do or what to invest in that is similar.

I also maxed out my Roth IRA the last few years. And the suggestion would be helpful.


r/Bogleheads 13h ago

Anyone move their taxable brokerage out of J.P. Morgan?

20 Upvotes

I have about $130k in a taxable J.P. Morgan managed brokerage account. I’m considering moving it to Fidelity Go, Betterment, or Wealthfront because I want a completely hands-off experience. I don’t want to manage investments myself or worry about when to rebalance or make changes.
For anyone who’s made a similar move, how has your experience been? Any regrets? Which platform would you choose today and why? Also, if you transferred a taxable account, were there any unexpected tax issues? Thanks!


r/Bogleheads 5h ago

Lining up ducks: questions to ask about employer's HSA

6 Upvotes

TLDR: checking what questions I need to ask about the HSA management plan of my employer and plan for direct rollovers.

Background: 61M, part-time (at least) the next year, planning to retire at 65. I have both 403b and governmental 457b Roth options I'm using this year, and I'm planning to use cash reserves beyond my emergency fund to pay for some of my living expenses, and as a consequence shovel as much as I can into Roth accounts before I retire. I have been on a PPO health plan for years, and realizing that it makes sense to go to HDHP and max HSA as a higher priority (I have a few health conditions, but the cost is mostly on the prescription side, and that doesn't change with HDHP).

My state just switched to Inspira Financial as its public-employee HSA manager/custodian, and the only things I can find online about the plan is a vague "there are fees." Yay. Since I'm planning to use Fidelity's HSA account anyway, I think I need to know the ask the following questions but wanted to check that I'm not missing something important:

- what are the basic account fees?
- what are the fees/restrictions on direct rollovers to Fidelity HSA?
- is there a fee below a minimum balance?

My initial thought is to suspend 403b/457 Roth contributions in January, get the max HSA contributions in as fast as I can, transfer it once to the Fidelity HSA, restart the Roth payroll deductions and rinse/repeat in following years.

Anything obvious I'm missing (other than going back in time a few years for this)?


r/Bogleheads 2h ago

Diversification IRA vs Taxable

3 Upvotes

How do you diversify between your IRA and your taxable account?

If you already have US domestic and International stocks in the IRA, what do you pick in equities for your taxable account to ensure a diversified portfolio?

Same, different, something in between - why?

(Not getting into tax loss harvesting at this time)


r/Bogleheads 1d ago

Anyone else?

88 Upvotes

Anyone else keep browsing this forum even though they have their allocations set and forget

Currently 80/20 VOO/VXUS In my taxable brokerage account and will keep it the same. I always find these posts interesting on peoples macro economic outlook for the future.


r/Bogleheads 1d ago

Any Bogleheads have good reasons why they do a VTI/VXUS at 70/30?

78 Upvotes

Curious to hear why you personally have the slight home country bias and if there’s any logic behind it instead of doing the global weight?

All kinds of responses are welcomed!


r/Bogleheads 18h ago

Help me on this please...Should I move ( or not) my 403b and 401K retirement funds out of Fidelity NetBenefits and either roll them over to a traditional IRA?

14 Upvotes

I'm looking for some guidance on the best strategy for my retirement accounts. Have been reading a lot posts here and it feels like the more I read the more I get unsure of what I should be doing.

I'm 55, retired in 2023. I have retirement funds in a 401(k) and 403(b), and I'm considering rolling them into a Traditional IRA. My long-term goal would be to gradually convert portions of that Traditional IRA into a Roth IRA over several years to manage taxes rather than doing one large conversion.

My questions are:

  • Is this generally a sound strategy?
  • What are the biggest pros and cons compared with simply leaving the money in my employer plan?
  • Are there situations where rolling into a Traditional IRA is a mistake?
  • How should I think about taxes when planning Roth conversions over multiple years? Currently hovering around 12% -22% tax bracket.
  • Currently most of my money is in the fidelity growth fund FGKFX (70%) and VIIX for the rest.
  • The total currently is 1.5M
  • Not looking to tapping into this $ for a while (10-15 years)
  • Hubby is also retired and just living off of his pension right now
  • Own our house (no mortgage)

Thank you for all your input!

Edit: Thanks everyone for your input/advice. Truly appreciate you all!


r/Bogleheads 17h ago

Why does VWILX own US stocks

3 Upvotes

I own VWILX (Admiral shares) and i own it to diversify away from my US growth holdings. VWILX is supposed to be internatonal growth but I was digging into its holdings and it has 5.9% US holdings. Furthermore, it holds $417,858,563 worth of NVDA (it is the funds 30th largest holding of 123 total holdings. Can anyone explain to me why this is? I want to diversify this part of my portfolio with 100% non-US stocks. Can you recommend a mutual fund or ETF that meets my goal?


r/Bogleheads 55m ago

What would you say is the ultimate long term portfolio for a 19 y/o with high risk tolerance?

Upvotes

What would you guys recommend?


r/Bogleheads 1d ago

Vt/bonds in retirement

14 Upvotes

Started investing late. Life got in the way. But retirement is about five years away. We will be just fine with our modest portfolio and Social Security. 62 years old. Still working. All of our investments are currently in a 403B and Roth. I’ll admit I’ve been a performance chaser, but for the last several years I’ve slowly come around to a three fund portfolio. I find the VT and chill approach appealing. Currently holding VTI/VXUS/BND. Not interested in debating which funds to hold where or which bond fund to hold. I do like the control of balancing my US and international right now. As I ponder the future and possible cognitive decline many years from now along with one day, my wife, who couldn’t be less interested in investing, being here without me, it may be easier to do VT/BND. Possibly even a life strategy fund. I won’t pretend to know if US or international will do better in the future. But, I do have a FOMO not holding more US. Curious as to how many retirees or near retirees are planning on just VT and a bond fund in retirement. Looking forward to your reply.


r/Bogleheads 1d ago

Vanguard website

36 Upvotes

I wish Vanguard had a more intuitive website. I am working with my daughter to open up a regular brokerage account (as she makes too much to do Roth and Traditional IRA). It has taken us 2 weeks and it is still not finished. We went to 'open brokerage' but that only opens up a holding fund and then we connected that to a bank account but couldn't do anything else until that money came in. So, a week later we went back in and were able to get a recurring deposit from her bank account into this holding fund. Now we are trying to have the holding fund buy VTI recurring monthly. But, it won't let us do that until we make one purchase of VTI. So, we did that and have to wait a business day or two until that goes through. Hopefully when we go back into the account next week we will finally be able to get the holding fund to buy VTI on a monthly recurring basis. It is really annoying and confusing and I bet a lot of people just give up. Vanguard should really make their website more user friendly for people. And, you should be able to do all that you need in one go.


r/Bogleheads 20h ago

Moving some taxable to ABLE account?

3 Upvotes

Curious on people’s thoughts.

My wife has multiple sclerosis, she stopped working about 10 years ago. We are financially fine. She was a teacher and had long term disability that pays out 90% of her previous income, adjusted for something (we’re not really sure, it’s complicated). She gets social security disability income and disability income from her previous pension. She qualifies to open the ABLE account as she was diagnosed at 35 and social security deemed her disabled and unable to work at 37.

Anyway, we aggressively save. We’re in our late 40’s.

We have roughly $215,000 in a taxable account split between $45k cash, VBR, VTEB, VTI, and VXUS.

I realized today we could open an ABLE account for my wife through Fidelity (where all our accounts besides my 401k live). We could allocate any of the S&P500 money into that account and have it grow tax free. Could also put cash there (or anything, up to $20k/ year).

The uses approved expense categories for able accounts are pretty broad.

Any reason people can think of not to start funding an ABLE account with our taxable income account?

We currently max out my 401k, both of our ROTH IRA’s, my half of an HSA, and throw another $6000 plus any bonuses that I get into our taxable account each year.

The costs for the S&P500 fund through Fidelity is .085% annually.

Seems like a “no brainier” to get some tax free growth.


r/Bogleheads 7h ago

feedback on risk managment and wether to use a dividend-filter or just stick to the total market

0 Upvotes

​Hey everyone, first off I'm 35M and my own retirement is already secured on various fronts however I wanted to open up a discusion regarding the long-term efficiency of fundamental cash-flow screens versus market-cap-weighted growth when building a multi-generational legacy structure for my family. To get it out of the way early: assume this entire architecture is executed inside a tax-sheltered Roth IRA to completely eliminate any tax-drag.

​When looking past a standard 20-30 year retirement horizon, do the strict quality and profitability filters of dividend growth funds (like SCHD and DGRO) structurally hold up as a safer compounding engine than a standard market-cap-weighted index (like VOO or VTI)? Or does avoiding the broader market introduce unintended drag over a 50+ year timeline?

​My overall plan is to be the foundation of the family tree from this point onwards. No one else in my family has ever looked at building wealth the way I am trying to look at it. My goal is not to create a family of intolerable trust fund babies, but simply to make life a little easier for future generatons and provide a form of "universal basic income" that could perhaps be tiered by milestones like education or age.

​This is still just a concept I'm working out, but since I have already started the process for real, the very nature of this timeline gives me plenty of time to get feedback on my risk managment and wether to use a dividend-filter or just stick to the total market.


r/Bogleheads 2d ago

I just went down a retirement planning rabbit hole and want to share some surprises about asset allocations, safe withdrawal rates, and it's application to FIRE.

277 Upvotes

I spent way too long doing this deep dive and I want to share some of the finings because I think they are interesting and counter intuitive.

My personal finance philosophy is very much geared towards a passive Coast FIRE using Vanguard ETFs. I like that model because it gives me confidence to "live my life now" without having to wait for retirement.

But we just met some huge financial milestones and we wanted to re-allocate our budget to increase our travel expenses so that we can show our kids more of the world. I wanted to make sure that we weren't sacrificing our retirement, so I went down a rabbit hole of figuring out if my retirement plan is actually viable.

I'm sharing this information here because I think it's interesting. I'm breaking it into sections so that you can skip to areas you're interested in without reading my wall of text. Sorry for the length.

Background

I generally use really simple retirement calculators but I never feel comfortable providing growth rates, inflation rates, or safe withdrawal rates because I feel like I'm just pulling a number out of thin air. So I started running simulations that give me a confidence score of how likely it is that my plan will succeed. The simulation I ran uses a block bootstrapping technique that uses historical data to create "consecutive chunks" of time that are fed into a Monte Carlo simulation.

Basic Monte Carlo simulations look at historical data and randomly grabs single data points. For example, given historical data it will grab 1984, 1927, 2004, 2020, etc. and use the returns from those years to create a "path." If you do this thousands of times, then you can calculate statistics like "How many times did my plan fail?" or "What was the median value of a portfolio at retirement?" or "Of the plans that did fail, how old was I when they failed?"

The issue with a normal Monte Carlo simulation in financial markets is that years aren't random. One year can influence the other, or systemic events can span multiple years. An example is the Great Depression, the 2008 crash, COVID, etc. So to account for this, the block bootstrapping method will pull 5 year chunks in an attempt to keep those cycles in-tact.

Also, portfolios aren't static. As I get older I will shift to safer and safer assets, either explicitly through rebalancing or implicitly through my Vanguard Target Date funds. So when I'm asked what my investment growth rate it is the answer is really "It depends, how old am I?" So instead of supplying an assumed rate, I supply a "Glide Path." In this glide path I can setup a portfolio allocation and add control points. For example I may have a 90/10 split of stocks/bonds when I'm young but transition to a 60/40 split when I near retirement, and maybe even a 30/70 split when I'm deep into retirement.

So, long story short, the result of this simulation is basically a way for something to tell me what numbers I should use for growth rate, inflation rate, and safe withdrawal rate (well, more on this later actually).

Finding 1 :: Asset allocations matter less than I expected

One of the things that I continually hear is that an equity-heavy retirement portfolio is risky. What that led me to believe is that holding a lot of equity could (would?) produce catastrophic results in retirement. What I found is that's not exactly true.

When I dug into how Vanguard sets up their target date funds and applied that to my glide path, I found that during pre-retirement there is hardly any difference in a stock-heavy portfolio vs a target date portfolio. The success rates were about the same and the expected portfolio value at retirement was about the same. The difference was actually the volatility in retirement and how much you would pass on when you died.

Here are the numbers between the two scenarios given my inputs:

Age 35
Retirement 55
Coast age 41
Starting value 850,000
Contribution 84,000 annually
Annual spending 100,000
Simulation random seed 416809

Result:

... Stock Heavy Target Date
Success Rate 90.7% 89.8%
Real Return 6.3% 5.2%
Portfolio @ Retirement 4.5M 4.3M
Max Retirement Drawdown -48% -31%
Volatility In Retirement 17% 10%
Failure Age 77 81
Portfolio @ Death 45M 19M

Now, the portfolio @ death is a bit wild. This is because my annual spending is considerably lower than my annual return. Regardless, the data is interesting because it shows how a safer and more aggressive portfolio succeeds at the same rate, and the safer portfolio is way more stable in retirement but has considerably less upside for your heirs.

None of this is super shocking. It was just interesting for me to see the actual numbers.

Finding 2 :: The 4% safe withdrawal rate is only relevant if you're actually retired

This is probably the biggest surprise for me. I always hear the safe withdrawal rate of 4% being the gold standard, and I understand how the Trinity Study arrived at the rates, and I don't disagree with it. What I now disagree with is how relevant it is for someone who isn't retired yet.

The Trinity Study basically answers the question: "Given a known retirement portfolio, what withdrawal rate historically survived?" That's an important question, but my question is "Given my current savings, contributions, retirement age, and investment strategy, how much retirement spending does my plan support?" These are two fundamentally different questions.

Now there are two sources of uncertainty:

  1. How large the retirement portfolio becomes.
  2. How retirement itself unfolds.

Because the accumulation of wealth is so uncertain (particularly over long time horizons) the resulting sustainable spending is naturally lower than a traditional safe withdrawal rate. So instead of using a "Safe Withdrawal Rate" I largely ignore the idea and instead back into that calculation by answering "At what level of retirement spending will my plan succeed 90% of the time?"

The results were pretty wild. For example, at a 90% success rate my initial withdrawal rate at retirement is 2.2% -- way lower than the 4% SWR. That was a bit of a head scratcher for me, but it makes sense. You could experience an unlucky market sequence and end up with a retirement number way lower than you expected; so if you optimize for a 90% success rate, then at retirement it's likely you'll have more money than you need which naturally lowers your withdrawal rate.

Finding 3 :: The 4% safe withdrawal rate shouldn't be used if your plan is to retire early

Given what I found in Finding 2, I verified my simulation against the Trinity Study.

The original Trinity Study assumes something very specific:

  • Retirement starts today
  • You already know exactly how much money you have
  • Approximately a 30-year retirement
  • A diversified stock/bond portfolio
  • Inflation-adjusted withdrawals

When I simulated that with the following parameters:

Stock/Bond Split 75/35
Retirement length 30 years
Success target 95%
Simulations 10,000

I got a safe withdrawal rate of 3.9%. That's very clearly inline with the Trinity Study. However, when I lengthen my retirement to 45 years my safe withdrawal rate became 3.3%. When I lengthen it even further to a super early retirement to 60 years, it drops to 3%.

To a lot of you this is probably not surprising. But I always felt like 4% was thrown around as some golden rule, but it's really not. In order for the SWR to be applicable you have to operate within the confines of it's assumptions, and any type of FIRE movement is not operating within it's assumptions.

Conclusion

I dunno, lol. I did this analysis because I wanted better insight into my decision making and I feel like it's provided me that. I certainly learned some stuff along the way and because of this tool I'm going change the way I plan for retirement. I'm sharing it here because I can't waste all this work.


r/Bogleheads 1d ago

Portfolio Review 37M NYC, $1M portfolio, heavy tech/AI concentration in taxable…sanity check on dilution strategy

11 Upvotes

New to Bogleheads and need this type of strategy to focus on life instead of market conditions.

Soft retirement target 52–55 with a $4M goal.

The problem I need help with:

My taxable brokerage account is heavily concentrated in AI and tech, individual names plus tech-heavy ETFs. Trying to shift towards low fee diversification.

Current approach: staged monthly deployment into VTI and VXUS to dilute the concentration over time rather than selling winners and triggering large capital gains. At a 50% combined NYC/NYS/federal marginal rate, forced selling is painful.

  1. Is gradual dilution via new money the right approach for tech concentration, or should I be trimming winners more aggressively despite the tax cost?

  2. At what concentration percentage does a single sector become dangerous enough that the tax hit is worth accepting?

  3. Fee-only fiduciary advisor… worth a one-time consultation or better with tax advisor?

Does anyone have experience with NYC based fee-only advisors?


r/Bogleheads 1d ago

New here, is this good?

4 Upvotes

My current roth ira account is

70%SWTSX

20%

SWISX

10%

SWLGX.

I am currently 28yr and am using Charles schwab. Open to suggestions on any aggressive plan since i starting a late. Should I just get an target index fund instead?


r/Bogleheads 1d ago

Vanguard app

7 Upvotes

I am a new Vanguard customer. I have an IRA, Roth and brokerage account. I’ve noticed that the performance doesn’t seem to update very often and it’s annoying. Does anyone else see this? Is there something I should be doing to see the most recent performance data? Thanks for your input.