"I think there's a lot of froth, I think there's a lot of concentration," Rob Arnott told Business Insider.
The S&P 500's Shiller P/E ratio cleared 40 for the first time since the dot-com bubble, when it preceded a 49% crash in the benchmark stock index.
The yearly cost of attending some private colleges and universities is nearly six-figures.
Discover why current S&P 500 valuations may be less overvalued than expected, with high profit margins and AI trends ...
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