
Investors pour $57B into cheaper SPYM ETF, challenging SPY's dominance for long-term holders.
In 2026, investors have moved about $57 billion into the State Street SPDR Portfolio S&P 500 ETF (SPYM), attracted by its lower fees (0.02% vs. SPY's 0.0945%) and more efficient structure as an open-end fund. SPYM tracks the same S&P 500 index as SPY...

