For example, year to date, the $241 billion Vanguard S&P 500 ETF (VOO) and the $277 billion iShares Core S&P 500 ETF (IVV) have had the largest inflows, totaling $24 billion and $16.2 billion, respectively. ... Fastest Growing ETFs Of The Year. TickerTMFX FundMotley Fool Next Index ETF Fund Assets Now ($M)29 Assets 12/31/21 ($M)1 % Increase2769% 19 more columns 21 Jun 2022