alt Hacker NewsThe purpose of a benchmark is to reflect the market. If the US economy is pumping out high-growth but overpriced & unprofitable companies via IPOs, at unreasonable valuations, the benchmark should reflect that.
It's not S&P's fault this is happening.
On the contrary. There are many benchmarks, some small subset of which are intended to reflect the whole market.
There are indices for every little thematic and niche corner or strategy or idea, there are broad-as-possible indices, and there are indices with requirements like listed age and profitability.