Stocks to Watch: F, MRK, P&G & More

Take a look at some of Friday's morning movers:

Proctor & Gamble - The household products maker cut its earnings expectationsfor the year, sending shares lower in pre-market trading.

Ford - The American automaker reported earnings that fell compared to the same period last year, but still topped estimates, pushing shares higher in pre-market trading.

Merck - The pharmaceutical giant announced a big increase in quarterly earnings,despite lower-than-expected sales.

Amazon.com - At least 11 brokerages boosted their price target on the online retailer a day after the company reported earnings that blew past Wall Street's expectations. Shares surged in pre-market trading.

Expedia - The online travel agency beat earnings growth estimates, thanks to an increase in its international hotel revenue. In addition, at least five brokerages lifted their price target on the firm, sending shares sharply higher in pre-market trading.

Zynga - The social network game developer rose in pre-market trading after it reported quarterly earnings and revenue that beat Wall Street's expectations, but analysts seemed to be unimpressed, with at least four brokerages slashing its price target on the firm.

Aetna - The company edged higher in pre-market trading after Bernstein said the health insurer's recent pullback creates a buying opportunity. The company posted earnings in the previous session that missed earnings estimates.

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