Compare/Updated Oct 26, 2026, refreshed every trading day
SPLG vs SPYM
SPDR Portfolio S&P 500 ETF against State Street SPDR Portfolio S&P 500 ETF: 4 years of returns, risk and today’s technical read, from Kavout’s own data.
SPLG and SPYM delivered essentially identical performance over the 944 trading days from Jul 19, 2022 to Apr 24, 2026: $1,000 grew to $1,921, a 92.1% total return. Neither clearly did better overall. SPYM led slightly over one month, 9.0% versus 8.6%, while all other listed periods were identical. Their 12-month volatility was 12.9%, worst drawdown was -18.7% from Feb 19, 2025 to Apr 8, 2025, and daily-move correlation was 1.000. Both have a 0.02% expense ratio, so risk and cost were effectively the same. The practical difference is fund size: SPYM had $165B in assets versus $102B for SPLG, while prices were $83.58 and $84.03, respectively. Performance history therefore provides no meaningful basis to prefer one over the other.
- Price is above its 200-day average ($78); 50-day at $79.
- RSI 71, overbought. Supertrend says buy. ADX 27, so the trend is strong.
- Price is below its 200-day average ($85); 50-day at $90.
- RSI 42, neutral. Supertrend says sell. ADX 15, so the trend is weak.
Head to head
Which has returned more, SPLG or SPYM?
SPLG beat SPYM in 23 of the last 45 months; SPYM won the other 22. The typical monthly gap was 0.01 points.
Total return by period
Which is riskier?
Both: Feb 19, 2025 to Apr 8, 2025
- 1.000
- correlation of daily moves, 4 years
- 1.00
- SPLG move per 1% in SPYM
- 0.998
- correlation, last 12 months
Month by month
Of the last 45 months. The typical gap was 0.01 points.
When did they diverge?
| Month | SPLG | SPYM | Gap |
|---|---|---|---|
| January 2023 | +6.3% | +6.3% | -0.04 pts |
| February 2023 | -2.5% | -2.5% | +0.04 pts |
| September 2022 | -9.2% | -9.3% | +0.03 pts |
| October 2022 | +8.2% | +8.2% | -0.02 pts |
Where the numbers come from. 944 daily adjusted closes per fund from the Kavout market-data API, dividends included. Signals and indicators are Kavout’s own, refreshed nightly. Every figure is calculated from those adjusted closes.
Holdings and fees
What do you actually own with SPLG and SPYM?
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