Closing Bell: U.S. Stocks' Best Week of 2016; Facebook Supports Apple

U.S. stocks ended mixed on Friday, though they did manage to close out the week with gains of more than 2%, their best performance of the year. Crude oil fell below $30 even as a count on active oil rigs in the U.S. showed its ninth straight week of declines. Deutsche Bank (DB) has set some ambitious goals at its trading unit, reportedly targeting a return above 10%. Europe's largest bank has not set a timeframe for its goal. United Continental (UAL) jumped after announcing it expects to repurchase $1.5 billion worth of stock in the first quarter. The airline had previously forecast its share repurchases at around $750 million. Facebook (FB) has come out in support of Apple (AAPL) in its resistance against the FBI to unlock the iPhone of one of the San Bernardino shooters. TheStreet's Keris Lahiff reports from Wall Street.