U.S. stocks turned mixed after consumer confidence rebounded in March. Consumers grew more confident this month as stock markets recovered from a devastating start to the year, while talk of a possible recession faded. Lennar (LEN - Get Report)  climbed after besting analysts' estimates in its fiscal first quarter. SunEdison (SUNE)  tanked after one of its units warned it was at 'substantial risk' of bankruptcy. The solar company's shares were already sharply lower on reports the SEC is investigating whether it misled investors over its liquidity position. Chipotle (CMG - Get Report)  was under pressure after Wedbush downgraded to UNDERPERFORM from NEUTRAL with a $400 price target. Analysts said a sales recovery by 2018 was far more likely than shorter-term forecasts. TheStreet's Keris Lahiff reports from Wall Street.