
SPY outperforms RSP in mega-cap rallies, but RSP gains as market breadth returns in 2026.
The Invesco S&P 500 Equal Weight ETF (RSP) and the SPDR S&P 500 ETF Trust (SPY) both track the S&P 500 but differ in weighting: SPY is cap-weighted, heavily favoring mega-cap stocks like NVIDIA and Apple, while RSP equally weights all 500 stocks. SPY...

