In the race among S&P 500 ETFs, VOO and IVV are gaining ground on SPY. According to Yahoo Finance, these two exchange-traded funds are becoming popular choices for investors looking to track the performance of the S&P 500 index. While SPY has long been the dominant player in this space, VOO and IVV are catching up in terms of assets under management and trading volume. Investors are increasingly turning to these alternatives for their low fees and efficient tracking of the S&P 500 index. As the competition heats up, it will be interesting to see how these three ETFs continue to fare in the S&P 500 ETF race.