Earnings Preview: Facebook Inc (FB), Google Inc (GOOGL), Microsoft Corporation (MSFT), Amazon.com Inc (AMZN)

This week marks the pinnacle earnings season for the Standard & Poor's 500, as more than 150 companies are scheduled to report. Social networking company Facebook Inc. reports quarterly results after the closing bell Wednesday, along with e-commerce company eBay Inc., semiconductor company Qualcomm Inc. and telecommunications provider AT&T Inc. Meanwhile, technology giant Google Inc. will post results Thursday, along with Microsoft Corporation and online retail giant Amazon.com Inc.