Social contrast: Facebook rose 5.3 percent to $174.38 Thursday after it beat earnings estimates fueled by advertising revenue that rose by nearly half from a year earlier. Also Thursday, Twitter sank 11 percent, to $17.50, despite strong earnings as investors focused on flat user numbers. Facebook closed Friday at $172.45; Twitter finished the week at $16.75.

Deal bounce: Health information site WebMD soared 20 percent to $66.10 Monday after agreeing to be acquired by the investment firm KKR for about $2.8 billion, or $66.50 a share. The stock closed at $66.18 Friday.

Nerfed: Hasbro fell 8.1 percent to $106.51 Monday despite reporting stronger-than-expected earnings after the toymaker cited some softness in its Brazil and U.K. markets. The stock closed Friday at $105.74.

Takeoff: Boeing jumped 8.3 percent to $230.15 Wednesday after posting second-quarter profit and cash flow well ahead of Wall Street estimates and lifting its full-year forecasts. Aggressive cost cutting helped results. Shares closed Friday at $241.27.

Earth moving: Caterpillar jumped 4.3 percent to $112.84 Tuesday after reporting better results for the latest quarter than analysts expected. It also raised its forecast for revenue and profit for the full year, citing increased demand across many of its markets. Shares closed the week at $114.10.

Piling higher: McDonald's rose 3.8 percent to $157.60 Tuesday after its revenue and earnings topped forecasts as customers responded to a new line of burgers and $1 sodas. Shares closed Friday at $155.85.

news services