I thought it might be interesting to look at the monthly performance of three different exchange-traded funds that track the S&P 500 Index (iShares S&P 500 Index ETF (IVV), SPDR S&P 500 Index ETF (SPY), and Vanguard S&P 500 Index ETF (VOO)). The newest ETF of the bunch is Vanguard’s VOO, which has monthly return data going back to October 2010. I used that month as the basis for the comparison.
Of the three ETFs, VOO has the lowest expense ratio of .05% compared to .09% for IVV and SPY.
To calculate the returns, I downloaded the data from Yahoo! Finance and used the Adjusted Closing Price, which adjusts the price for dividends and splits.
Here’s what I found:
The performance differences were very close between the three. The best performing ETF of the three was iShares. Keep in mind that these numbers do not reflect transaction charges (brokerage fees and such).