Dimensional US Sustainability Core 1 ETF (DFSU) is a ETF from Dimensional and State Street SPDR S&P 500 ETF Trust (SPY) is a ETF from State Street Investment Management. Over the past year DFSU returned +21.71% while SPY returned +22.80%. Year to date, DFSU is up 11.86% versus a gain of 13.10% for SPY.

Over three years, DFSU compounded at +19.28% per year against +20.98% for SPY. Across the full 4-year window we track, DFSU has the edge at +20.67% annualized vs +8.83%. Past performance does not guarantee future results.

SPY has been the more volatile fund, with annualized monthly volatility of 15.3% compared with 13.9% for DFSU. Lower volatility generally means a smoother ride, though it often comes with lower long-run returns.

The deepest peak-to-trough decline in our data was -19.9% for DFSU and -56.5% for SPY. Drawdown depth is worth weighing if you expect to sell during market stress rather than ride it out.

The two funds' monthly returns correlate at 0.97. They move almost in lockstep, so holding both mostly duplicates the same exposure.

DFSU charges 0.15% per year while SPY charges 0.09%. On a $10,000 position that is $15 vs $9 annually, a gap of $6 per year that compounds over a long holding period. On income, DFSU currently yields 0.84% against 1.01% for SPY.