Accuracy is generally an important consideration in computer chips, but a team of researchers led by Rice University are touting a new "inexact" chip (dubbed PCMOS) that they say could lead to as much as a fifteen-fold increase in efficiency.

ENGADGET: Researchers tout efficiency breakthrough with new 'inexact' chip

Aetna shares were even cheaper before they jumped 12 percent this month on the day officials unveiled stronger-than-expected year-end results, offered a surprisingly upbeat 2011 forecast, and announced a fifteen-fold increase in what had previously been an anemic dividend payout.

FORBES: Health Insurance Stocks To Buy In Spite Of Obamacare