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SPY backtest: ten years of the S&P 500

What $10,000 in the SPDR S&P 500 ETF did over the last decade, measured on daily closes — including the part most summaries leave out: how much of it came from dividends.

HoldingsWeight · share
100%
Over the last
Starting with
Adding every month
Compare with

Up to 10 holdings and 20 years. Weights are relative. The comparison line gets the same money on the same days.

Running the backtest…
At a glanceSPY
Index trackedS&P 500
What it holdsThe 500 largest US companies, weighted by market cap
Holdings505
Expense ratio0.09%
PaysQuarterly
LaunchedJanuary 1993

Fund facts as of 2026-09-06. Holdings counts change at each index rebalance.

The dividend part nobody quotes

SPY is discussed almost entirely in terms of price. Its yield is low enough that most summaries round it away — and then quote a ten-year return that quietly includes it anyway. The summary above separates the two, so you can see what share of the gain actually came from dividends rather than from the index rising.

It is a smaller share than a dividend fund's, and it is still not nothing. Reinvested over a decade, a sub-one-and-a-half percent yield compounds into a real slice of the ending balance. That is the case for reinvesting even when income is not why you bought the fund.

Why this drawdown looks different

The maximum drawdown here is measured on daily closes, so it is the worst peak-to-trough you actually sat through. Month-end data smooths away the sharpest days and reports a gentler number — which is the version most comparison sites publish.

You will also see much larger figures quoted elsewhere, sometimes over 50%. Those are since-inception: SPY dates to 1993 and has been through two crashes that fall outside a ten-year window. Neither figure is wrong. They answer different questions, and the window is doing most of the work in the answer.

What SPY is, mechanically

It tracks the S&P 500 — the largest US companies weighted by market capitalization — and charges 0.09% a year. Market-cap weighting means the fund is more concentrated than “500 companies” suggests: the largest handful carry a disproportionate share, so SPY's recent history has leaned heavily on the same names that drive QQQ.

Sources

Index and expense ratio from State Street's SPY documentation. Prices and dividend history from Financial Modeling Prep's end-of-day feed.

How this backtest works

Daily bars, not monthly

The portfolio is marked to market every trading day, so drawdowns and volatility reflect what actually happened between month-ends — 252 observations a year instead of 12.

Split-adjusted prices, cash dividends

Prices are split-adjusted closes; each dividend is applied as cash on its ex-date at the matching split-adjusted per-share amount. Dividend-adjusted (“total return”) prices are never used, so income is counted exactly once.

A lump sum, or money every month

The weights set the opening trade and then drift, unless you rebalance each January. A monthly amount buys more at the target weights on each month's first trading day, and the comparison line gets the same. No taxes, no commissions.

The window is the overlap of every holding's price history, and a dividend cut is only reported when both the annual total and the average payment fell. Full methodology on the backtest tool.

Questions

How much of SPY's return comes from dividends?

Less than most people assume, but not nothing — the summary below states it as a share of the total gain for this window. The S&P 500's yield is low, yet reinvested over a decade it still compounds into a meaningful slice of the ending balance.

Why is the drawdown here bigger than the one I see elsewhere?

It is measured on daily closes, so it is the real peak-to-trough you lived through. Month-end data smooths away the worst days and reports a smaller number. Conversely, since-inception drawdowns quoted elsewhere cover 1993 onward and include crashes outside this ten-year window.

Does this include the fund's fee?

SPY's 0.09% expense ratio is already inside its price, so yes. Taxes and commissions are not — returns here are gross.

Page last updated . The backtest above runs on today's data each time the page opens. Open the calculator empty.