IOO vs VOO: returns, Sharpe ratio and drawdown

Over the past year, IOO returned +14.78% against +13.45% for VOO. Over five years, IOO averaged +14.41% a year, compared with +11.46% for VOO. IOO had the higher Sharpe ratio over the past year (0.74 vs 0.73), meaning more return for each unit of volatility. The worst peak-to-trough drop over the past year was -8.90% for VOO and -9.94% for IOO. Dividends over the past year came to 1.07% of VOO's price, against 0.83% for IOO. Their daily returns had a correlation of 0.95 over the past year, which is very high.

IOO charges 0.40% a year and VOO 0.03%. Over five years, reinvested dividends added 1.55 points a year to IOO's return and 1.55 to VOO's.