Large-Cap ETF Dominance Fading

For the last few years,large-cap ETFshave been outperformingmidcap ETFsandsmall-cap ETFsas the broader market fared better during a period of low volatility and lower return expectations.But this year, that has begun to change. While the S&P 500, as represented bySPDR S&P 500 ETF Trust ( SPY ) , is up