Earnings season is in full swing after Citigroup beat analysts' estimates as the company's earnings rose 30 percent in the first quarter. Citigroup Inc. (NYSE: C) was among one of the first companies reporting earnings in the financial sector this week. Other earnings reports to keep an eye on this week include investment bank Goldman Sachs Group Inc. (NYSE: GS) on Tuesday, Bank of America Corp. (NYSE: BAC) on Wednesday, and Morgan Stanley (NYSE: MS) on Thursday.Also on Tuesday, the Coca-Cola Co. (NYSE: KO) and Johnson & Johnson (NYSE: JNJ) are reporting before the market opens, while Intel Corp. (Nasdaq: INTC) and Yahoo! Inc. (Nasdaq: YHOO) report after the close. The economic calendar today revealed that China's economic growth slowed unexpectedly in the first quarter as GDP slid to 7.7 percent. A separate report showed that New York manufacturing activity barely expanded in April, as the New York Fed's Empire State index fell to 3.1 points in April from 9.2 in March. Also on Monday, the National Association of Home Builders said confidence among U.S. home builders fell in April after concerns over lack of developed lots and rising costs for building materials.On the economic calendar for Tuesday: consumer price index, Core CPI and housing starts are issued at 8:30 am EST. Jessica Menton, reporting for IBTimes TV. (Video Source: REUTERS)