SPY vs SPYM: Performance, Holdings, Fees & Risk
SPY and SPYM are ETFs, but they can differ materially in exposure, yield, fees and risk. SPY is State Street SPDR S&P 500 ETF, while SPYM is State Street SPDR Portfolio S&P 500 ETF. SPYM has the lower expense ratio. Current AlgovestIQ evidence has SPY ahead on AIQ Score, 66 versus 64.
What is the main difference between SPY and SPYM?
SPY and SPYM hold essentially the same portfolio: 99.6% of their weight is in the same securities.
| Metric | SPY | SPYM |
|---|---|---|
| Fund | ||
| Expense ratio | 0.09% | 0.02% |
| Holdings | 505 | 508 |
| Top-10 concentration | 38.2% | 38.1% |
| Distribution yieldTrailing 12 months | 0.99% | 1.01% |
| Average volume | 46,698,705 | 13,181,341 |
| Performance | ||
| YTD return | +12.8% | +12.9% |
| Risk | ||
| Annualized volatility | 12.8% | 12.7% |
| Max drawdown (1Y) | -9.1% | -9.1% |
| Beta | 1.00 | 1.00 |
| Sharpe ratio | 0.91 | 0.74 |
| Sortino ratio | 1.39 | 1.15 |
| AlgovestIQ | ||
| AIQ Score | 66/100 | 64/100 |
| AIQ Edge Score | 9/10 | 9/10 |
| Momentum | 63/100 | 66/100 |
| Risk Resilience | 88/100 | 87/100 |
AlgovestIQ AIQ Comparison
State Street SPDR S&P 500 ETF vs State Street SPDR Portfolio S&P 500 ETF
SPY leads
SPY leads by 2 AIQ points, primarily on Quality.
Fragile: 0 of 4 evidence groups support SPY, and its current signal state is conflicted.
State Street SPDR S&P 500 ETF
State Street SPDR Portfolio S&P 500 ETF
The Algovestiq AIQ Score currently favors SPY over SPYM, 66 versus 64 as of Oct 21, 2026. SPY's advantage is driven primarily by stronger quality. SPY also shows the weaker technical structure relative to its 50-day moving average. 0 of 4 covered evidence groups favor SPY today, and the comparison is rated Fragile on stability: the AIQ gap is narrow at 2 points. SPY lead: Stable — the AIQ differential has held near 2 points over 30 sessions.
Compare State Street SPDR S&P 500 ETF and State Street SPDR Portfolio S&P 500 ETF across performance, expense ratio, dividend yield, drawdown, volatility and the Algovestiq AIQ Score.
SPY vs SPYM: which fits what
Each row is settled by a single measure. Where the gap is too small to matter it reads Similar, and no row decides the comparison as a whole.
| If you want | SPY | SPYM | Fits |
|---|---|---|---|
| Lower costExpense ratio | 0.09% | 0.02% | SPYM |
| Broader diversificationNumber of holdings | 505 | 508 | Similar |
| Lower concentrationWeight of the 10 largest holdings | 38.2% | 38.1% | Similar |
| Higher incomeTrailing 12-month distribution yield | 0.99% | 1.01% | Similar |
| Smaller drawdownsMax drawdown, 1 year | -9.1% | -9.1% | Similar |
| Lower volatilityAnnualized volatility, 1 year | 12.8% | 12.7% | Similar |
Similar means the gap is within 0.01 percentage points of expense ratio, 25% more holdings, 3 points of top-10 weight, 0.2 points of yield, 2 points of drawdown or 1 point of volatility. Past drawdowns and volatility describe the funds’ history, not their future.
Performance over time
Total return with distributions reinvested, from daily closes for both ETFs.
Total return comparison
Growth of $10,000, distributions reinvested
Split-adjusted closes; each distribution is reinvested at the close on its ex-dividend date. Taxes and trading costs are not modeled.
Compare SPY and SPYM against another ticker
Open a multi-ticker workspace without changing this focused pair page.
AIQ Factor Divergence
Where the two separate, on the four dimensions behind the AIQ Score. Bars read outward from a shared zero: further from the centre is a wider gap.
- Quality84 vs 75SPY +9
- Momentum63 vs 66Even
- Risk Resilience88 vs 87Even
- Value41 vs 41Even
0 of 4 evidence groups favor SPY. SPY’s edge is concentrated in quality.
What changed since the last close
Latest scored session 2026-10-20, compared against the prior scored session 2026-10-19.
Largest factor move: Momentum +16
New signals
- Uptrend Structure Active — bullish, trend, long horizon
Largest factor move: Momentum +16
New signals
- Uptrend Structure Active — bullish, trend, long horizon
SPY's lead was unchanged in the latest session.
Deeper signal detail for each name lives on its own signals page — SPY and SPYM both carry a full feed there.
Fund facts, side by side
Two funds tracking overlapping universes are separated by cost and risk far more than by holdings. Those lead here.
| Measure | SPY | SPYM | Why it matters |
|---|---|---|---|
| Expense ratio | 0.09% | 0.02% | Lower is better — it compounds against you every year you hold. |
| Holdings | 505 | 508 | More holdings means broader diversification, not better returns. |
| Average volume | 46,698,705 | 13,181,341 | Liquidity — matters most if you trade size. |
| Annualized volatility | 12.8% | 12.7% | Lower is a steadier ride for the same exposure. |
| Max drawdown (1Y) | -9.1% | -9.1% | The worst peak-to-trough loss over the past year. |
| Sharpe ratio | 0.91 | 0.74 | Return per unit of risk. Higher is better. |
| Beta | 1.00 | 1.00 | Sensitivity to the broad market. Neither direction is better — it depends on the role in your portfolio. |
Where the exposure actually sits
Sector exposure for each fund, ordered by the size of the difference.
How much of the same holdings they own
SPY and SPYM share 99.63% of their weighted exposure across 504 common holdings.
Every SPY holding is also in SPYM, and 2 holdings are unique to SPYM. Owning both adds little diversification — they are largely the same exposure in different wrappers.
SPY is the more concentrated of the two: its ten largest positions are 38.17% of the fund, against 38.1% for SPYM (505 holdings vs 508). Concentration cuts both ways — it is what drives outperformance when the top names work, and what makes the drawdown deeper when they do not.
Largest shared positions
| Holding | SPY | SPYM | Shared |
|---|---|---|---|
| NVDANVIDIA CORP | 8.08% | 8.07% | 8.07% |
| AAPLAPPLE INC | 7.33% | 7.32% | 7.32% |
| MSFTMICROSOFT CORP | 5.59% | 5.58% | 5.58% |
| AMZNAMAZON.COM INC | 3.77% | 3.76% | 3.76% |
| GOOGLALPHABET INC CL A | 2.98% | 2.98% | 2.98% |
| AVGOBROADCOM INC | 2.61% | 2.61% | 2.61% |
| GOOGALPHABET INC CL C | 2.39% | 2.38% | 2.38% |
| METAMETA PLATFORMS INC CLASS A | 2.16% | 2.16% | 2.16% |
Shared weight is the lower of the two positions — the portion of capital both funds genuinely have in the same security.
What SPY adds that SPYM doesn’t
SPY has no position of 0.01% or more that SPYM lacks or holds at under half the weight.
What SPYM adds that SPY doesn’t
SPYM has no position of 0.01% or more that SPY lacks or holds at under half the weight.
Each list is a fund’s largest positions by weight that the other fund does not hold, or holds at less than half the weight.
SPY vs SPYM: five-year payout growth
SPYM grew its split-adjusted payout faster over 2020-2025 — 6.04% a year against SPY's 5.05%. Neither fund reduced its annual distribution in any year of the window.
| Dividend metric | SPY | SPYM |
|---|---|---|
| 5Y payout CAGR | 5.05% | 6.04% |
| 2020 annual payout | $5.691 | $0.677 |
| 2025 annual payout | $7.281 | $0.907 |
| Calendar-year declines | 0 | 0 |
| Peer rank | #95 of 138 | #86 of 138 |
Split-adjusted annual distributions, 2020–2025. Research as of Sep 19, 2026. Yield and expense ratio above are current values, not part of this window.
AIQ Agreement Matrix
0 of 4 covered evidence groups favor SPY. A wide gap backed by one group is a weaker case than a narrow gap backed by five.
| Evidence group | Favors | Reading |
|---|---|---|
| AIQ Score | Even | 66 vs 64 |
| Fundamentals | Not covered | Not covered |
| Valuation | Even | Value 41 vs 41 |
| Technicals | Even | Price vs 50-day 0.6% vs 0.6%; vs 200-day 5.9% vs 6% |
| Risk Resilience | Even | Risk Resilience 88 vs 87 |
| Analyst expectations | Not covered | Not covered |
✓ agrees with the overall verdict · ✕ points the other way. Groups marked “not covered” lack data on one or both of SPY and SPYM and are excluded from the count.
AIQ Decision Stability
The conclusion is sensitive to small changes. Treat the lead as provisional and watch the flip conditions below.
- The AIQ gap is narrow at 2 points. (argues the conclusion is provisional)
- Only 0 of 4 covered evidence groups agree. (argues the conclusion is provisional)
- The lead has been steady session to session. (supports the conclusion holding)
- The leader is throwing conflicting signals. (argues the conclusion is provisional)
Stability combines the score gap, how broadly the evidence agrees, how steady the lead has been across daily snapshots, the current signal state on both names, and analyst dispersion on SPY.
How the comparison changed
120 daily snapshots · Jun 21 – Oct 20SPY lead: Stable — the AIQ differential has held near 2 points over 30 sessions.
- Today
- SPY +2
- 66 vs 64
- 7 sessions ago
- SPY +2
- 66 vs 64
- 30 sessions ago
- SPY +2
- 66 vs 64
- 90 sessions ago
- SPY +4
- 70 vs 66
The lead changed hands 2 times in this window, most recently on Oct 1 when SPY moved ahead of SPYM.
AIQ Signal Divergence
Only the signals that bear on the head-to-head. A conflicted name is carrying bullish and bearish rules at the same time — the technical evidence is not pointing one way.
4 bullish / 1 bearish / 1 neutral, conflicted
No signal that the other name lacks.
4 bullish / 1 bearish / 2 neutral, conflicted
Only SPYM
- Bollinger Band Squeeze — neutral, volatility, short horizon
Both carry 6 more signals that do not separate them: Golden Cross Active, ATR Contraction - Coiling, EMA Ribbon Expansion Bullish, 52-Week High Proximity, Uptrend Structure Active, MACD Bearish Crossover.
SPY leads the comparison while carrying a conflicted signal state, which is one reason the stability rating is not higher.
Price vs model alignment
Whether the latest session's price move confirms what the model did over the same session, or contradicts it.
Price and the AIQ Score both moved up over the latest session (price +0.53%, AIQ +4 points).
Price and the AIQ Score both moved up over the latest session (price +0.51%, AIQ +4 points).
What would flip this result
A state, not a forecast. These are the specific, observable changes that would reverse the verdict — not a price prediction.
- 1SPYM closes the Quality gap — currently 9 points behind, the largest single contributor to SPY's edge.
- 2SPYM's Bollinger Band Squeeze turns directional — it is neutral today and would confirm a change in trend.
- 3SPY's conflicting signal state resolves bearish — it currently carries 4 bullish and 1 bearish rules at once.
- 4A regime shift changes factor weighting — Quality and Value carry the heaviest weights in the composite, so a rotation toward either would move the result most.
The full evidence
Every number behind the verdict. The leader is called above each group so you are not left to solve it from the table.
Performance
SPYM leads 5 of 5 windows| Metric | SPY | SPYM |
|---|---|---|
| 1 week (5 sessions) | -1.2% | -1.1% |
| 1 month (20 sessions) | -0.6% | -0.5% |
| 3 months (63 sessions) | 2.9% | 2.9% |
| 6 months (126 sessions) | 9.2% | 9.2% |
| Year to date | 12.8% | 12.9% |
| 1 year (252 sessions) | 16.4% | — |
Technicals
Split| Metric | SPY | SPYM |
|---|---|---|
| RSI (14) | 56.2 | 56.2 |
| ADX (14) | 12.5 | 12.7 |
| Price vs 50-day | 0.6% | 0.6% |
| Price vs 200-day | 5.9% | 6% |
| Volatility (1M, annualized) | 9% | 9.1% |
Risk
Split| Metric | SPY | SPYM |
|---|---|---|
| Beta | 1 | 1 |
| Sharpe ratio | 0.91 | 0.74 |
| Sortino ratio | 1.39 | 1.15 |
| Max drawdown | -9.1% | -9.1% |
| Current drawdown | -1.3% | -1.3% |
| Annualized volatility | 12.8% | 12.7% |
| Value at risk (95%) | -1.4% | -1.4% |
Straight answers
Short answers to the questions fund investors ask about this pair, from the figures above.
What is the difference between SPY and SPYM?
SPY and SPYM hold essentially the same portfolio: 99.6% of their weight is in the same securities.
How much do SPY and SPYM overlap?
SPY and SPYM share 99.63% of their weighted exposure across 504 common holdings. Every SPY holding is also in SPYM, and 2 holdings are unique to SPYM. Owning both adds little diversification — they are largely the same exposure in different wrappers.
Which ETF is more diversified, SPY or SPYM?
They hold a similar number of positions: 505 for SPY and 508 for SPYM.
Which has the lower expense ratio?
SPYM has the lower expense ratio, 0.02% a year against 0.09% for SPY.
Which ETF has the higher distribution yield?
Their trailing 12-month distribution yields are similar: 0.99% for SPY and 1.01% for SPYM.
Which ETF has been more volatile?
Their volatility over the past year is similar: 12.8% annualized for SPY and 12.7% for SPYM.
Which ETF has had the smaller drawdown?
Their worst peak-to-trough falls over the past year are similar: -9.1% for SPY and -9.1% for SPYM.
Compare SPY and SPYM with others
Continue your research
This page answers which of the two. These answer the questions on either side of it.
How this comparison is scored
The Algovestiq AIQ Score composites four factors — Quality, Value, Momentum and Risk, each carrying a fixed weight. Sentiment is reported separately as SentimentPulse and is not folded into the composite. Scores refresh every trading day, and this page regenerates from the latest snapshot rather than being written once.
The verdict names a leader, states how broadly six independent evidence groups agree, and rates how durable that conclusion is given the score gap, its recent trajectory and the current signal state on both names.
How to use side-by-side comparison →This comparison is informational and educational, not investment advice. AIQ scores update daily; re-check after earnings, guidance or macro data that materially changes either name’s factor profile.