One measure of the stock market's health shows it's in a state that has been experienced three previous times, all before or during a crash.

Business Insider cites data from FactSet that puts the price-to-earnings ratio at 27.94. That stood around 30 right before the market's 1929 crash, it climbed to nearly 45 in the years during the tech bubble before bursting to the low-20s, and also hit around 28 during the financial crisis of 2007-2009.

The latest number does not necessarily mean the market is about to crash. After all, it rose from about 20 to its high of roughly 45 during the tech bubble.

Friday's figure could signal a similar climb.

Stocks have finished strong in recent weeks, with the three major indexes breaking records almost every day. The S&P 500, for example, ended this week with 3 percent growth.

Billionaire hedge fund manager Marc Lasry said Friday the markets are currently on a "sugar high" one month after Donald Trump won the presidential election.

Investment guru Carl Icahn said what Trump has been doing in the weeks since he won the election "point to a much, much better economy."

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