That is not true at all. RSP has for many years outperformed SPX over many different time horizons. It really is not until 2019 that there is a significant un

That is not true at all. RSP has for many years outperformed SPX over many different time horizons. It really is not until 2019 that there is a significant underperformance which also coincides with the outsized top 10 market caps. ref: https://stockcharts.com/freecharts/perf.php?RSP,SPY https://stockcharts.com/freecharts/perf.php?RSP,SPY change the window size to whatever time horizon you want.