S&P 500 vs Russell 1000

When comparing the S&P 500 and the Russell 1000, I found a story of two distinct eras. From 1994 until today, the returns are practically identical with only a .01% annualized difference!

Source: Bloomberg

However, the S&P 500 beat the Russell 1000 by a wide margin from the common datas’ inception of 1978 to 1994.

Source: Bloomberg

Selecting a benchmark includes many factors, but I found the above interesting.