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Shares in Google dropped to a new 52-week low at $409.68 on Wednesday with early Thursday morning numbers even lower at around $406.38.
This all follows a move by the U.S. Department of Justice to investigate a Google-Yahoo search advertising partnership, which some analysts say are making investors weary.
"Google doesn’t stand to make a lot of money from the (Yahoo) deal, but if it’s rejected, Yahoo may have no choice but to sell to Microsoft and that wouldn’t be good for Google," said Jason Helfstein, a media and Internet analyst with Oppenheimer & Co.
Yahoo isn’t doing much better, as it also reached a new 52-week low a week ago of $17.75 a share.
At the end of the day, Google shares bounced back, closing up about 5 percent to $433.75, still low but just about where they were earlier in the week.