* Health and Medical News:Biotech investors up big amid bubble talk

Some view biotech stocks as a bubble, but hedge funds are riding optimism in the sector to monster gains.

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via Health and Medical NewsHealth and Medical News Pfizer Inc has already had its takeover overtures rebuffed three times by rival AstraZeneca Plc, but investors in the U.S. drugmaker say it can tolerate a little more rejection before going hostile with the deal. AstraZeneca turned down a sweeten...

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