Maybe you know this already, but this reads like exactly the kind of reasoning that people looking back at irrational market euphorias point to as a sign things were about to go awry.
The 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.
The 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.