The 530A (the "Trump Account") is a tax-free growth vehicle. The fund you hold inside it decides most of what the balance looks like 18 years from now. The right answer for almost every family is one low-cost broad-market index fund, held until the child turns 18. Below is a short list of funds that fit that shape, ranked roughly by how simple they are to live with.
The Shortlist
| Fund | Ticker | Expense Ratio | What It Holds | Who It's For |
|---|---|---|---|---|
| Vanguard Total Stock Market ETF | VTI | 0.03% | ~3,700 U.S. stocks | Maximum diversification, one ticket |
| Vanguard S&P 500 ETF | VOO | 0.03% | 500 largest U.S. companies | Simple, almost identical to VTI in outcomes |
| Fidelity Total Market Index | FSKAX | 0.015% | ~4,000 U.S. stocks | Fidelity customers, lowest expense ratio |
| Schwab Total Stock Market | SWTSX | 0.03% | ~2,500 U.S. stocks | Schwab customers |
| Fidelity Zero Total Market | FZROX | 0.00% | ~2,500 U.S. stocks | Fidelity only; no expense ratio at all |
| Vanguard Target Retirement 2045 | VFIVX | 0.08% | Stock/bond mix that shifts over time | Hands-off, prefer built-in glide path |
| Vanguard Total World Stock | VT | 0.06% | ~9,500 U.S. + international stocks | Want international exposure baked in |
These are the funds you can reasonably hold for 18 years without revisiting. Anything more exotic — sector ETFs, actively managed funds, thematic products — usually doesn't improve outcomes and often reduces them through higher fees.
The Principle Behind the List
The three things that matter inside a 530A, in order of impact:
- Expense ratio. A 0.5% fund costs roughly 10x more over 18 years than a 0.05% fund. At a 7% return, 0.5% in fees reduces the final balance by about 9%. That's the single largest decision you'll make. See Understanding Expense Ratios for the math.
- Diversification. A broad index fund holds thousands of companies, so no single bad stock can wreck the account. Individual stocks can, and at 18 years out the volatility adds risk without adding return.
- Discipline. The fund that stays in the account compounding for 18 years beats the fund you swap out in year 6 because some part of the market did better. Index funds are boring on purpose. That's a feature.
Everything on the shortlist above checks all three.
All fund returns are estimated and historical. Past performance is not a guarantee of future results. All investing involves risk, including possible loss of principal.
The Default: VTI or VOO
If you don't want to think about this, pick VTI (Vanguard Total Stock Market) or VOO (Vanguard S&P 500). Both are at 0.03% expense ratio, both have ~20+ year track records, and at any reasonable time horizon the difference between them is tiny.
- VTI holds the entire U.S. stock market — including mid-cap and small-cap companies. Historically, it's outperformed the S&P 500 by a small margin in some decades and underperformed in others. Over 18 years they tend to converge.
- VOO holds the 500 largest U.S. companies. Simpler, slightly more stable, and the single most-held index fund in the U.S.
For Fidelity customers, FSKAX (0.015%) and FZROX (0.00%) are direct substitutes for VTI. FZROX's zero expense ratio is real — Fidelity absorbs the cost as a loss-leader. The catch: FZROX is proprietary to Fidelity and does not transfer in-kind to other brokerages. If you think you might roll the account elsewhere later, FSKAX is the safer choice.
Target-Date Funds: The "Set It and Forget It" Option
A target-date fund is a single ticker that holds a stock/bond mix and automatically rebalances toward more conservative assets as the target year approaches. For a child born in 2025, the rough target would be a 2045 fund (18 years out) or 2050 (if you want a more aggressive allocation held longer).
- VFIVX (Vanguard Target Retirement 2045): 90% stocks, 10% bonds today. Shifts toward 50/50 over time. 0.08% expense ratio.
- Comparable funds exist at Fidelity (FFFGX), Schwab (SWYHX), and most major brokerages.
Target-date funds are reasonable for families who don't want to pick anything and don't want to rebalance anything. The trade-off: expense ratios are slightly higher (0.08%–0.15% vs 0.03% for VTI), and the glide path toward bonds starts earlier than many 18-year investors would choose on their own. Over 18 years the gap is real but small.
International Exposure: VT or VXUS
About 40% of global stock market value sits outside the U.S. — held in Europe, Japan, emerging markets. A U.S.-only fund like VTI misses all of it. For most 18-year horizons this doesn't matter much; U.S. returns have dominated for 15+ years. But the future isn't the past.
Two ways to add international:
- VT (Vanguard Total World Stock): One fund for everything. Roughly 60% U.S., 40% international. Expense ratio 0.06%. Simpler than a two-fund portfolio.
- VTI + VXUS: Hold VTI for U.S. exposure and VXUS (Vanguard Total International Stock) at whatever percentage you want. Common mixes: 80/20 or 70/30 (U.S./international).
If you don't care enough to pick an international weighting, use VT. If you do care, VTI + VXUS gives you control.
What About Bonds?
An 18-year horizon is long enough that a 100% stock allocation has historically been the highest-return choice. Bonds reduce volatility but also reduce expected return. For most families, adding bonds to a newborn's 530A is a small loss of expected balance in exchange for a smoother ride the parent won't feel anyway — the parent isn't holding the account, the kid is.
If your family's risk tolerance is low, or you want something smoother, Best Fund for Conservative Parents covers bond-heavier allocations, target-date funds on shorter glide paths, and funds that trade some return for less downside.
Funds to Avoid Inside a 530A
- Actively managed mutual funds. Expense ratios of 0.5%–1.5% eat returns for 18 years. Most active funds underperform the index after fees. Avoid.
- Leveraged or inverse ETFs. TQQQ, SQQQ, etc. Built for short-term trading, not compounding. Their structure guarantees decay over long holds.
- Individual stocks. One bad stock can erase half the account. Index funds spread that risk across thousands of companies.
- Crypto ETFs. Volatility is extreme; 18-year return distribution is wide and uncertain. If you want crypto exposure, a small allocation outside the 530A is better — the 530A's tax-free status isn't worth much if the balance is zero.
- Sector or thematic ETFs. AI funds, cannabis funds, clean energy funds. They chase performance, fail to diversify, and swap out of favor every few years.
The 530A is the wrong account to experiment in. Boring compounding wins.
How the Fund Choice Affects the Final Balance
At 18 years with $1,000 seed + $200/month contributions, same market, different expense ratios:
| Fund Type | Expense Ratio | Approximate Balance at 18 |
|---|---|---|
| Zero-cost index (FZROX) | 0.00% | ~$87,500 |
| Standard total-market (VTI) | 0.03% | ~$87,000 |
| Target-date (VFIVX) | 0.08% | ~$86,100 |
| Typical actively-managed fund | 0.75% | ~$77,500 |
| High-fee fund | 1.25% | ~$72,000 |
The difference between 0.03% and 0.75% is about $10,000 on the same account. Over a lifetime of investing, the cost of high-fee funds is the single largest preventable loss most families absorb.
Estimates assume a 7% gross annual return before fees. Not a guarantee — all investing involves risk, including possible loss of principal.
Picking One, Already
The decision tree most families should use:
- Fidelity customer, don't want to move the account ever: FZROX.
- Fidelity customer, might move later: FSKAX.
- Vanguard, Schwab, Robinhood, or anywhere else: VTI.
- Want a single fund with bonds mixed in: VFIVX (Target Retirement 2045).
- Want international exposure built in: VT.
Pick one. Leave it alone. Check back when the child is 10.
Common Questions
Can I hold multiple funds?
Yes. Two-fund and three-fund portfolios are common. A simple version: 70% VTI + 30% VXUS for a domestic/international split. More funds adds complexity without much added return.
How often should I rebalance?
Once a year is enough. For an all-stock single-fund account, zero rebalancing is fine. If you hold bonds or international, rebalance annually to hold allocation steady. Our Fund Comparison tool will model the rebalance math for you.
Should I time the market?
No. The math is unambiguous: time in the market beats timing the market, and 18 years is a long time. Set up the account, contribute, and don't touch it.
What fund does Robinhood pick by default?
Robinhood's 530A default is an S&P 500 index fund at approximately 0.03% expense ratio. You can change it any time from the app.
Are any of these funds not eligible inside a 530A?
All of the funds listed here are eligible. The 530A allows any publicly traded stock, ETF, or mutual fund. A small number of exotic products (some leveraged ETFs, private funds) may be restricted by your specific custodian.
The Bottom Line
Pick a broad-market index fund with an expense ratio under 0.10%. Hold it for 18 years. That's the entire strategy. For most families, that's VTI or VOO — one ticker, one decision, 18 years of compounding.
Try the Fund Recommendation Quiz if you want a nudge, or the Growth Calculator to see what different fund-plus-contribution combinations project to by age 18.
This article is general educational information, not investment advice. Seedling is not a registered investment advisor. All investing involves risk, including possible loss of principal. Past performance is not a guarantee of future results.