The only funds that have topped IBIT’s $3.2 billion of year-to-date inflows are mammoth longstanding index ETFs from iShares and Vanguard that offer exposure to the S&P 500 or the total stock market. In the number one spot with $13 billion in inflows thus far this year is the iShares Core S&P 500 ETF (IVV), which has a whopping $428 billion in assets-under-management (AUM). Number two with $11.1 billion in inflows is the Vanguard 500 Index Fund ETF (VOO), which has nearly $398 billion in AUM.