Benzinga's Top #PreMarket Losers

shares fell 4.01 percent to $33.50 in pre-market trading. Bank of America downgraded Best Buy from Buy to Underperform and lowered the price target from $45.00 to $32.00.

shares tumbled 1.57 percent to $20.00 in pre-market trading. ConocoPhillips

confirmed a notice of termination for the 3-year ENSCO DS-9 drillship contract.

shares declined 1.35 percent to $114.01 in pre-market trading. Analysts at KeyBanc downgraded Domino's Pizza from Overweight to Sector Weight.

shares dropped 0.73 percent to $46.32 in pre-market. FBR Capital Markets analyst Daniel H. Ives maintained an Outperform rating on Microsoft, with a price target of $53, ahead of the company's F4Q15 results scheduled for July 21.

fell 0.64 percent to $29.71 in pre-market trading after rising 0.71 percent on Thursday.