Stocks Close Mostly Lower Ahead of Apple's Product Launch Event

U.S. stocks mostly fell on Monday with energy stocks leading the decline on falling oil prices. But the Nasdaq held up and managed to close in the green. Tech stocks showed strength led by GoPro (GPRO). Yahoo (YHOO) and Twitter (TWTR) followed closing the day with big gains. Boeing (BA) was the Dow Jones Industrial's brightest star. The aerospace giant rose after a deal with Ryanair to buy its air craft. All eyes will be on Apple (AAPL) Tuesday when it hosts its much anticipated product launch. Like Apple has done in the past, lips are tight and not much has been leaked on the details of the event. But many are speculating Apple will reveal the new iPhone 6 and the rumored iWatch. Barnes and Noble (BKS), Krispy Kreme (KKD) and discount retailer Burlington Stores (BURL) are set to report earnings Tuesday.