Fidelity Total Market Index Fund (FSKAX) is a mutual fund from Fidelity Investments (US) and Schwab Total Stock Market Index Fund (SWTSX) is a mutual fund from Charles Schwab Asset Management. Over the past year FSKAX returned +20.42% while SWTSX returned -82.81%. Year to date, FSKAX is up 11.73% versus a gain of 11.80% for SWTSX.

Over three years, FSKAX compounded at +19.01% per year against -37.87% for SWTSX; over five years the annualized figures are +10.51% and -25.24% respectively. Across the full 5-year window we track, FSKAX has the edge at +10.51% annualized vs -25.24%. Past performance does not guarantee future results.

SWTSX has been the more volatile fund, with annualized monthly volatility of 41.6% compared with 16.1% for FSKAX. 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 -26.0% for FSKAX and -86.0% for SWTSX. 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 0.34. They move independently enough that combining them can meaningfully diversify a portfolio.

FSKAX charges 0.02% per year while SWTSX charges 0.03%. On a $10,000 position that is $2 vs $3 annually, a gap of $1 per year that compounds over a long holding period. On income, FSKAX currently yields 0.94% against 0.99% for SWTSX.