ETF comparison
SPSM vs SPY
US Small Cap vs US Large Cap.
State Street SPDR Portfolio S&P 600 Small Cap ETF · State Street SPDR S&P 500 ETF Trust
Holdings overlap
0 positions appear in both funds. Buying equal dollars of SPSM and SPY would leave roughly 0.0% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
SPSM is 6 bps cheaper than SPY. On a $100,000 position that's about $64/yr more in fees for SPY.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with SPSM vs SPY.
Top shared holdings
0 shared in totalNo shared holdings between these funds.
Only in SPSM
604 total- FormFactor Inc 0.68%
- Viasat Inc 0.66%
- Molina Healthcare Inc 0.65%
- Argan Inc 0.60%
- BrightSpring Health Services Inc 0.60%
- Element Solutions Inc 0.59%
- MaxLinear Inc 0.58%
- Krystal Biotech Inc 0.53%
- ESCO Technologies Inc 0.49%
- Match Group Inc 0.48%
Only in SPY
505 total- NVIDIA CORP 8.50%
- APPLE INC 7.32%
- MICROSOFT CORP 5.77%
- AMAZON.COM INC 3.71%
- ALPHABET INC CL A 3.03%
- BROADCOM INC 2.54%
- ALPHABET INC CL C 2.43%
- META PLATFORMS INC CLASS A 2.41%
- MICRON TECHNOLOGY INC 1.82%
- TESLA INC 1.57%
Related comparisons
More comparisons with SPSM
- SPSM vs SPYM · State Street SPDR Portfolio S&P 500 ETF 0.0%
- SPSM vs VO · Vanguard Morningstar Mid-Cap ETF 0.0%
- SPSM vs VTV · Vanguard Morningstar Value ETF 0.0%
- SPSM vs VUG · Vanguard Morningstar Growth ETF 0.0%
- SPSM vs IJR · iShares Core S&P Small-Cap ETF 97.6%
- SPSM vs VIOO · Vanguard S&P Small-Cap 600 Index Fund ETF Shares 91.4%
More comparisons with SPY
- SPY vs VIGI · Vanguard International Dividend Appreciation Index Fund ETF Shares 0.0%
- SPY vs VIOG · Vanguard S&P Small-Cap 600 Growth Index Fund ETF Shares 0.0%
- SPY vs VIOO · Vanguard S&P Small-Cap 600 Index Fund ETF Shares 0.0%
- SPY vs VIOV · Vanguard S&P Small-Cap 600 Value Index Fund ETF Shares 0.0%
- SPY vs VYMI · Vanguard International High Dividend Yield Index Fund ETF Shares 0.0%
- SPY vs VOO · Vanguard S&P 500 ETF 92.2%
Percentages are holdings overlap with the named fund.
Open SPSM or SPY at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.