In 'What's Ahead on Wall Street' for the week of March 14, we have a mix of both earnings and economic data. The week begins with the latest financial results from MannKind (MNKD), followed by DSW (DSW), Oracle (ORCL) and Fogo de Chao (FOGO) on Tuesday. Midweek, we get results from FedEx (FDX) and towards the end of the week, we hear from Adobe Systems (ADBE) and Tiffany (TIF). One of the companies investors will be tracking is FedEx. For the latest quarter, Wall Street is looking for earnings of $2.35 a share on revenue of nearly $12.5 billion. Both the top and bottom line are expected to grow year over year. But RBC Capital analysts are cautious due to the higher-than-expected peak season costs. TheStreet's U-Jin Lee reports from Wall Street.