Five years ago today was when the market hit its intraday low of 666. Since then, the market has been on a bull run, defying the market bears who called for a pullback at every turn. But how long can it possibly continue?

In this segment of Monday's Investor Beat, host Chris Hill and Motley Fool analysts Matt Argersinger and Taylor Muckerman look at a recent statement from hedge fund manager Seth Klarman. His long tenured track record of market outperformance lends a lot of weight to his words, so when he says the market is entering bubble territory, it could definitely mean that looking more carefully at valuation today before buying a stock could be a prudent decision.

Will investors run for the hills if these bubbles start to pop?
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Chris Hill, Matthew Argersinger, Taylor Muckerman, and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.