October delivers S&P 500 equal-weight stocks’ biggest outperformance since 2009 (SPY:NYSEARCA)

The S&P 500’s equal-weighted stocks staged a sharp comeback in October, outperforming the index’s market-cap-weighted counterpart by the widest margin since April 2009, in what Neil Sethi called a historic rotation.

The Invesco S&P 500 Equal Weight ETF (RSP