Warren Buffett Indicator reaches 199%, highest ever; Einhorn calls it the most expensive since 1996.

Einhorn says it’s the most expensive stock market since at least 1996

David Einhorn, the hedge-fund star who co-founded Greenlight Capital, isn’t thriving as the bull market turns three years of age. Greenlight’s main hedge fund has returned 9% this year, which the firm in a shareholder letter released on Tuesday calls “fine” on a “beta-adjusted” basis, but doesn’t “feel great” compared to the gains for the S&P 500…