It has primarily been institutional investors, corporate insiders, and other professionals that have benefited from the three-year bull market, while individual investors have remained bearish and pessimistic, and still pulling money out of stock mutual funds, in favor of cash and bonds.

FORBES: Two Years Of Fears Disappear

"We have no specific reason to think there is anything more to Larry's condition, but we find it odd that the company would already rule him out of the 2Q call which is likely still a few weeks away, " wrote JP Morgan stock analyst Doug Anmuth in a note to clients.

WSJ: Google CEO Larry Page Assures Employees About Health, Says 'Nothing Seriously Wrong'