Showing posts with label 3 fund portfolio. Show all posts

Sunday, June 7, 2026

Why Asset "Location" Matters More Than You Think

Most investors focus on what to buy — stocks, bonds, the classic 3‑fund portfolio. But very few think about where those investments should live. And that “where” quietly affects your taxes every single year.

I’ve written before about how smart asset location can boost long‑term returns. I also compared my approach with what Google Gemini suggested for the same $1 million sample portfolio. This time, I wanted to make the whole idea more hands-on. So I built an interactive Asset Location Optimizer using Google AI Studio.

The tool takes three ETFs — VTI, VXUS, and BND — and figures out the most tax‑efficient way to spread them across a Taxable account, Roth IRA, and Traditional IRA. It reads your balances, applies your target allocation, and shows you exactly how much tax drag you’re paying today versus what you could be paying.

In the sample case, the optimized setup cuts annual tax drag from $1,674 to $585 — a savings of $1,089 per year. Let that compound for 30 years, and it adds up to $195,691 in extra wealth.

The logic behind the tool is simple:

Bonds (BND) go in the Traditional IRA because bond interest gets taxed at ordinary income rates.
International stocks (VXUS) go in the Taxable account to capture the Foreign Tax Credit.
US stocks (VTI) go in the Roth IRA to maximize tax‑free growth.
Any leftover VTI fills the remaining space.

You still end up with the same overall 48/12/40 allocation — just arranged in a smarter way.

I built the entire app using prompts (aka vibe coding) in Google AI Studio, and it turned out to be a great educational tool. It makes asset location visual and intuitive, and it shows how much taxes quietly eat into returns. It’s not a replacement for a CPA or a CFP, but it’s a great way to understand the power of putting the right assets in the right accounts.

The tool also includes an AI Chat Advisor that explains the math, tax logic, and withdrawal strategies.

The screenshots below show the tool in action.

Disclaimer: This article is not intended to be investment advice. Consult a duly licensed professional for investment advice. The contents of this article are for educational purposes only and do not constitute financial, accounting, tax, or legal advice. Past performance is no guarantee of future results.

Tuesday, March 17, 2026

I Gave Three AI Tools the Same Simple Prompt. Only One Got It Right on the First Try.

In an earlier post, I explored how thoughtful asset location can improve the long‑term after‑tax return of a 3‑fund portfolio. As part of my ongoing experiments with modern AI tools, I decided to test how well they could recommend asset locations for the same sample $1 million portfolio.

The next section shows the exact prompt I used and the response generated by Google Gemini.

Prompt:

You are an experienced financial planner. I am getting ready to retire. My portfolio consists of the following accounts: Taxable $100,000, Roth IRA $50,000, Traditional IRA $850,000, Total $1,000,000. My desired asset allocation: Stocks 70% (20% of this in International stocks), Bonds 30%. I only want to use low-cost index funds and no actively managed funds. Please recommend which funds and what amounts should be placed in which account(s) i.e. taxable, Roth IRA, Traditional IRA to maximize long-term after tax return.

Response:

To maximize your long-term after-tax returns while maintaining your 70/30 asset allocation, you should prioritize asset location. This strategy involves placing less tax-efficient assets (like bonds) in tax-deferred accounts and high-growth assets (like stocks) in tax-exempt or taxable accounts.

Asset Allocation Strategy

Based on your $1,000,000 portfolio and desired 70/30 split (with 20% of stocks in international), your target amounts are:

Total Stocks (70%): $700,000

U.S. Stocks (80% of stocks): $560,000
International Stocks (20% of stocks): $140,000

Total Bonds (30%): $300,000

Recommended Asset Location

Account	Amount	Asset Type	Recommended Low-Cost Fund Examples
Taxable	$100,000	International Stocks	Vanguard Total International Stock ETF (VXUS)
Roth IRA	$50,000	U.S. Stocks	Vanguard Total Stock Market ETF (VTI) or Schwab S&P 500 Index (SWPPX)
Traditional IRA	$300,000	Total Bond Market	Vanguard Total Bond Market ETF (BND) or Fidelity Long-Term Treasury Bond Index (FNBGX)
Traditional IRA	$510,000	U.S. Stocks	Vanguard Total Stock Market ETF (VTI) or Fidelity 500 Index (FXAIX)
Traditional IRA	$40,000	International Stocks	Vanguard Total International Stock ETF (VXUS)

Strategic Rationale

Taxable Account (International Stocks): Placing international stocks here allows you to potentially claim the Foreign Tax Credit for taxes paid to foreign governments, which is lost if held in an IRA.
Roth IRA (U.S. Stocks): This account provides tax-free growth. By placing U.S. stocks here—which generally have higher long-term growth potential than bonds—you maximize the value of the tax exemption.
Traditional IRA (Bonds): Bonds generate interest income that is taxed at ordinary income rates. Holding them here defers those taxes until withdrawal, which is more efficient than paying annual taxes in a taxable account.
Filling the Gaps: Since your Traditional IRA is your largest account ($850k), it must hold the remainder of your U.S. and International stock allocations after the Taxable and Roth accounts are filled.

Execution Note

Rebalancing: It is easiest to rebalance within your Traditional IRA since selling and buying assets there does not trigger immediate capital gains taxes.
Low Costs: All recommended funds (VTI, VXUS, BND, etc.) have extremely low expense ratios (typically 0.03% to 0.08%), satisfying your requirement for low-cost index funds.

My Observations on the Prompt and the Response

As you can see, the prompt is simple and direct. It avoids technical jargon like “asset location,” while still conveying the key details about the responder (a financial planner), the requestor (approaching retirement), and the portfolio.

The response is similarly clear and direct, and even offers strategic rationale - despite my not explicitly asking for it. Importantly, its asset location recommendation aligns with the suggestions in my earlier post (see screenshot below).

I also ran the exact same prompt through Microsoft Copilot and ChatGPT. Neither produced the correct answer on the first attempt. They did get there eventually, but only after I pointed out both logical and arithmetic errors.

Improve Long-term After-tax Return on 3-fund Portfolio using Asset Location

Monday, August 4, 2025

Rethinking Global Exposure: How Much "International" Is Already in Your U.S. Stocks?

If you invest in three broad index funds - say, one for U.S. stocks, one for foreign stocks, and one for U.S. bonds - you’ve already embraced simplicity and diversification. But here’s a twist: did you know that nearly 30-40% of the revenue generated by S&P 500 companies comes from outside the United States?

From tech giants like Apple and Microsoft selling to global markets, to industrial firms navigating international supply chains, many U.S.-listed companies are anything but domestically confined. This raises a question that savvy investors are starting to ask: Should you factor this foreign revenue as part of your international allocation?

Let’s unpack it.

🌍 The Hidden Global Footprint in U.S. Stocks

While your U.S. index fund (like one tracking the S&P 500) is based on domestic listings, the companies within it often operate on a global scale. For example:

Information Technology sector: ~59% of revenue from abroad
Materials: ~47%
Industrials: ~32%
Utilities: Just ~2%

Clearly, not all sectors are created equal when it comes to foreign exposure.

So what does this mean for your portfolio?

🔄 Should You Adjust Your Allocation?

Possibly. Imagine your target allocation is:

60% U.S. stocks
30% international stocks or 33.33% of total stocks (30%/90%)
10% U.S. bonds

If 30% of your U.S. stock fund’s revenue comes from non-U.S. sources, your “real” international exposure might look like this:

Implicit exposure via U.S. stocks: 60% × 30% = 18%
Direct exposure from international fund: 30%
Total effective international exposure: 48%

This translates to an effective international exposure of 53% of your overall stock allocation (48%/90%). This may be in line with your goals or more than you intended.

As a point of comparison, the FTSE Global All Cap Index - covering approximately 7,400 companies across 47 countries - allocates around 58-60% to U.S. stocks, with the remaining 40-42% representing international equities, including both developed and emerging markets. If you consider the implicit exposure via U.S. stocks, the index's effective international exposure is 58-60%.

Some investors use this insight to adjust their direct international allocation, depending on their implicit exposure via U.S. stock funds.

🧮 Quick Tip to Rebalance

Here’s a fast method:

Estimate your U.S. fund's foreign revenue share (e.g., 30%)
Multiply that by its portfolio weight
Add it to your direct international allocation
Adjust to hit your desired global exposure

📌 Example: Let’s say that you have 60% of your portfolio in U.S. stocks and you want 30% international exposure. You already have 18% international exposure from U.S. stocks’ foreign revenue (60% × 30%). Then, you may only need 12% in direct international holdings. If you want 40% international exposure, you may need 22% in direct international holdings.

🧠 Why It’s Not a Perfect Substitute

Don’t ditch your international fund entirely. Revenue abroad doesn’t offer everything: foreign currency exposure, different regulatory environments, access to emerging markets, and local sector opportunities.

Think of your U.S. stocks as giving you indirect global participation - while your international fund adds true global diversity.

Bottom line: Use foreign revenue exposure as a tool for smarter allocation - but keep direct international investments for genuine global reach. It’s about refining your balance, not replacing it.

Wednesday, March 26, 2025

The Stock Market has (fill in the blank). What should I do now?

I often see this or similar questions posted on popular online investing and personal finance forums.

“The stock market has gone up (or down) a lot lately. What should I do now?” or “International stocks have not done much in the last 10 years. What should I do with them?” or "Is the recession coming? If so, what should I do?" or "Are we in the AI bubble? If so, what should I do?".

In most cases, the right answer to such questions may be “Do nothing”.

When such a question comes up in your mind, you do not need to rush to action based on a guess, a hunch or friend’s or expert’s recommendation. Take a deep breath and follow these steps to make your own rules-based decision, knowing that this strategy has always worked for long-term investors.

Step 1: Determine your Target Asset Allocation

Hopefully, you have already completed this step before starting your investing journey. If you have not, see the following post for details:

Using Vanguard Investor Questionnaire to determine your asset allocation

Note that this is an important prerequisite for this strategy to work.

Step 2: Determine your current Asset Allocation

If you have your accounts at Vanguard, you can use their Portfolio Watch tool to see your current asset allocation. The following post explains the Portfolio Watch tool in some detail:

Using Vanguard’s Portfolio Watch and Portfolio Tester for Rebalancing

Be sure to include your external (non-Vanguard) accounts in the Portfolio Watch as well. The above post explains how to do this.

Empower Personal Dashboard is another free tool that offers a streamlined way to view all your investment accounts in one place, giving you a clear picture of your overall asset allocation. For more details, just click the link above and explore the FAQ section at the bottom of the page.

Step 3: Rebalance (if necessary)

Lastly, if your actual allocation differs from your target allocation significantly (say, by 5 percentage points), it may be time to rebalance. Again, if you have your accounts at Vanguard, you can use their Portfolio Tester tool to help with rebalancing. The post mentioned in the Step 2 above explains how to use the Portfolio Tester tool.

If you find that there is no significant difference between your target and actual allocations, no action is required. However, if the gap is making you uneasy, it may be worth revisiting your target asset mix and rebalancing as needed to restore peace of mind.

Improve Long-term After-tax Return on 3-fund Portfolio using Asset Location

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Monday, January 30, 2023

Improve Long-term After-tax Return on 3-fund Portfolio using Asset Location

Summary

For most individual investors, a simple 3-fund portfolio consisting of U. S. Stock Index, International Stock Index and Bond Index is the best way to invest in the market.
In the accumulation (saving for retirement) phase, Asset Location (taxable, tax-free, tax-deferred) i.e. where you place your investments, is as important as Asset Allocation for maximizing after-tax return.
Rebalancing your portfolio once a year is a good practice. It enables you to buy low and sell high automatically.

The Kiplinger article Using Asset Location to Defuse a Retirement Tax Bomb explains the strategy of asset location and why it is crucial to lowering tax bills in retirement.

As the article warns, implementing the optimal asset location strategy can be tricky if your portfolio consists of actively managed funds or ETFs that blend multiple asset classes. However, the implementation is greatly simplified if your portfolio consists of only 3 passively managed asset class pure index funds or ETFs.

In order to use the guidelines in this article, you should meet the following prerequisites.

Asset Allocation: You have determined your suggested asset mix using the Vanguard Investor Questionnaire or using some other tool of your choice.
Index Funds or ETFs only: Your portfolio consists of only 3 broad-based index funds or ETFs investing in total U.S. stocks, international stocks and bonds respectively.

In order to maximize your long-term after-tax returns (especially after retirement during the withdrawal phase), use the following approach to determine the asset location i.e. taxable, Roth IRA and tax-deferred accounts, for your stock and bond funds or ETFs:

First, place total bond index fund in Traditional IRA and 401(k) accounts. Note that taxes on current income from bond investments in these accounts would be deferred until withdrawal. Also, capital gains would be taxed as ordinary income when withdrawn from these accounts during retirement. Maximizing bond allocation in these accounts will result in lower total income and therefore, lower taxes.
Next, place any remaining total bond index fund in the Roth account. Income from bond investments in the Roth account will be sheltered.
Next, place total international stock index fund in the taxable account. This order would work for most investors. It follows the recommendation by Bogleheads and Vanguard and is based on the set of assumptions related to US/International stock allocation, tax withholding rate, investor's marginal tax rate and qualified dividend proportion of the fund. Placing international stocks in the taxable account enables you to take advantage of foreign tax credit, which is not available in tax-advantaged accounts. Please refer to the above links to determine if it makes sense in your case.
Finally, place total US stock index fund in the taxable account and in any remaining space in the Roth account. Place the remaining stock investments in any remaining space in the Traditional IRA and 401(k) accounts. Taxable accounts provide favorable capital gains treatment during the withdrawal phase and Roth accounts provide tax-free growth for stock investments.

The following screenshot illustrates the above calculations using a hypothetical portfolio of $1 million consisting of taxable, Roth IRA and 401(k). It assumes target stocks and bonds allocation of 70/30 i.e. 70% stocks and 30% bonds and target international stocks allocation of 20% of total stocks.

3-fund Portfolio using Asset Location strategy

If you need to make changes to your portfolio allocation and location, you can use Vanguard’s Portfolio Tester tool to test and rebalance your portfolio.

The following example shows the Portfolio Watch for the simple 3-fund portfolio in a single account that has the current allocation of 75/25 (stocks/bonds) with 10% of stocks in international stocks.

Let us suppose that our target allocation is 70/30 with 20% of stock allocation in international stocks. You can use the Portfolio Tester tool to make hypothetical changes to bring the portfolio to the desired target. Although this portfolio consists of a single account, the tool can also be used for testing changes across multiple accounts (taxable, Roth and tax-deferred).

Click "Analyze" to see the current and hypothetical portfolios side by side.

Click "See Details" next to Hypothetical Asset Mix to see the detailed analysis including risk and return for both portfolios, using past 97 years' data (1926-2022).

Note, however, that your actual rebalancing decisions will depend on many factors, including, your capital gains tax bracket, your tax filing status (single, married filing jointly, etc.) and the amount of your potential taxable capital gains for the year.

To be sure, selling an appreciated fund or ETF may trigger a tax bill unless you are careful. Read the following article to learn about tax-efficient rebalancing strategies: 7 Rebalancing Strategies That Are Tax-Efficient, Too!

Using Vanguard Investor Questionnaire to determine your asset allocation

Using Vanguard’s Portfolio Watch and Portfolio Tester for Rebalancing

What is the Capital Gains Tax and How is it Calculated? | Kiplinger

7 Rebalancing Strategies That Are Tax-Efficient, Too!

Tax-efficient fund placement (Bogleheads)

Asset location can lead to lower taxes. Here's how to get more value.