Thanks to a last-minute run-up, the Dow Jones Industrial Average closed the day at 13275.20, about four points from its highest level since December 2007.

WSJ: Blue Chips Near a Five-Year High

Richard Peterson, a psychiatrist and founder of MarketPsych, which advises banks and big money managers, says news coverage of the Dow's run is likely luring people who had remained wary of stocks since the financial crisis in 2008.

NPR: Exodus From Bonds? Not Yet

On Aug. 31, 1998--smack in the middle of the greatest bull run in history--the Dow tumbled 6%.

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