Vanguard’s VOO, World’s Biggest ETF, Nabs Record Flows in April

The world’s biggest exchange-traded fund just got its biggest endorsement yet.

The $608 billion Vanguard S&P 500 ETF (ticker VOO) saw a nearly $21 billion inflow last month, the most in its 15-year history and the fifth largest amount ever taken in by a fund on a monthly basis, according to data compiled by Bloomberg Intelligence. It all happened as the underlying S&P 500 Index notched one of its choppiest months in recent memory, with large down days followed by relief rallies in the grip of President Donald Trump’s tariffs announcements.

Absorbing billions of dollars this year — ...