Apple (AAPL) reports the biggest annual profit in its history but its outlook was muted. The company's profit was $11.1 billion for its fiscal 4th quarter, up 31% from a year ago. Revenue was $51 billion, p 22% from last year. The results exceeded Wall Street estimates. Apple's performance was boosted by the sales of the iPhone. Apple sold 48 million of the smartphones in the quarter, up from 39 million in the same period a year ago. Apple's cash on hand reached $206 billion. Twitter (TWTR) shares reported another quarter of disappointing user growth. The numbers show the challenge that lies ahead for newly named CEO Jack Dorsey. Twitter added 4 million new users in the quarter. Walgreen (WAG) is buying smaller drug store rival Rite Aid (RAD) for $17 billion, including debt. If regulatory approval is granted, the combined company will have 18,000 stores.