SPY

S&P 500 ETF
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What is SPY? Understand the ETF before researching it

Understand its investment scope, concentration, risks and alternatives. This guide is free, with no sign-in required.

How SPY works

  1. S&P 500 rules
  2. Company selection and weights
  3. SPY portfolio
  4. Your ETF shares

1. What do you own?

SPY holds a portfolio designed to track the S&P 500, representing large US companies across sectors.

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SPY holds a portfolio designed to track the S&P 500, representing large US companies across sectors. Buying an ETF share is not direct ownership of every constituent stock. The index is not the whole US market and its membership changes.

2. Many holdings can still mean concentration

The S&P 500 is float-adjusted market-cap weighted, not equally weighted.

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The S&P 500 is float-adjusted market-cap weighted, not equally weighted. Large firms have more influence. Broad sector coverage does not remove top-company concentration or overlap with QQQ. Review portfolio weights before combining funds.

3. Where do returns come from?

Earnings, valuation changes and distributions contribute to returns.

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Earnings, valuation changes and distributions contribute to returns. Price return excludes reinvested dividends; total return includes them. The issuer lists a gross annual expense ratio of 0.0945%, deducted within the fund; spreads, brokerage and taxes also matter.

4. Understand the downside

Recession, inflation, interest rates and earnings disappointments can cause substantial losses.

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Recession, inflation, interest rates and earnings disappointments can cause substantial losses. A 20% loss requires a 25% gain to recover. A rolling 52-week drawdown is not an all-time-high drawdown. Home-currency returns also depend on exchange rates.

5. A practical research checklist

Start with portfolio role, holding period, overlap and tolerable losses.

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Start with portfolio role, holding period, overlap and tolerable losses. Compare matching dates, currencies and dividend treatment. Then study earnings and valuation together: TTM is reported history, Forward is forecast, and historical percentiles are not future probabilities.

6. Common questions

SPY is not capital protected.

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SPY is not capital protected. A lower share price does not necessarily mean a lower valuation. Index and investor returns can differ through costs and execution. SPY offers broader sector exposure than QQQ, but owning both does not eliminate overlapping risks.

Similar, but not interchangeable

ETFInvestment scopeKey distinction
SPYUS large companiesUS large companies
QQQNasdaq-100Nasdaq-100
View ETF: QQQ →
DIADow Jones Industrial AverageDow Jones Industrial Average
View ETF: DIA →
IWMUS small companiesUS small companies
View ETF: IWM →
Similar, but not interchangeable

SPY is not capital protected. A lower share price does not necessarily mean a lower valuation. Index and investor returns can differ through costs and execution. SPY offers broader sector exposure than QQQ, but owning both does not eliminate overlapping risks.

View ETF: QQQ →
SPY / VOO / IVV

SPY, VOO and IVV target the S&P 500. Combining them does not add a new investment universe. Compare current expenses, spreads, liquidity and execution costs rather than share prices.

VOO → · IVV →

Where to go next

QQQ →DIA →IWM →
About this guide

Product scope: issuer information. Educational interpretation: ETF-Investor. No claim of affiliation with the issuer.

State Street SPY

Free educational information, not personalized investment advice. Data dates and estimate labels remain important.

Research panel

SPY Current Price
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Valuation Percentile Scale

Tap or hover over a color band to view its investing discipline.

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Top 40 weighted holdings

Companies with the greatest current influence on SPY.

Holdings as of: 2026-10-08
#TickerMarket capTTM PEForward PEEPS growthWeightFrom 52W high
1NVDA——Premium—8.34%—
2AAPL——Premium—7.43%—
3MSFT——Premium—5.80%—
4GOOGL / GOOG——Premium—5.50%—
5AMZN——Premium—3.73%—
6AVGO——Premium—2.56%—
7META——Premium—2.38%—
8MU——Premium—1.75%—
9TSLA——Premium—1.58%—
10AMD——Premium—1.51%—
11BRK.B——Premium—1.42%—
12LLY——Premium—1.40%—
13JPM——Premium—1.32%—
14XOM——Premium—1.04%—
15V——Premium—0.96%—
16JNJ——Premium—0.92%—
17INTC——Premium—0.80%—
18WMT——Premium—0.74%—
19ABBV——Premium—0.72%—
20MA——Premium—0.69%—
21PLTR——Premium—0.68%—
22CSCO——Premium—0.68%—
23COST——Premium—0.63%—
24CVX——Premium—0.62%—
25AMAT——Premium—0.60%—
26LRCX——Premium—0.60%—
27CAT——Premium—0.55%—
28MRK——Premium—0.53%—
29PG——Premium—0.52%—
30BAC——Premium—0.52%—
31KO——Premium—0.51%—
32UNH——Premium—0.50%—
33PANW——Premium—0.49%—
34GE——Premium—0.47%—
35PM——Premium—0.47%—
36NFLX——Premium—0.45%—
37HD——Premium—0.44%—
38CRWD——Premium—0.40%—
39GEV——Premium—0.40%—
40TXN——Premium—0.39%—

Holdings weights use the latest available published snapshot. Missing values are not estimated.

Investment Discipline

  1. Buying SharesBuy in stages only below the 25th percentile; do not add shares merely because valuation is fair.
  2. 25%–75% Fair ValueHold. Cash-secured puts at lower strikes may be used while waiting for a better entry.
  3. 75%–95% ExpensiveKeep high-quality holdings; after sharp gains, high-strike covered calls may add cash flow.
  4. Above 95% Bubble ZoneThis is the only zone where gradually trimming shares to realize gains may be considered.