U.S. stocks struggled for direction, flitting between positive and negative territory for much of the morning on Thursday. A rebound in durable goods orders in January eased some of the concerns over the health of the U.S. economy. Oil continued to spiral lower as fears over global demand spiked following a warning from Citi economists. Citi predicts a looming global recession tied to a slowdown in China. The energy sector was the worst performer on markets Thursday. AB InBev (BUD) fell after missing profit estimates due to weaker market share in the U.S. The world's biggest brewer reported a 10% decline in overall revenue as cost of sales increased and currency headwinds continued. SeaWorld (SEAS) could be righting its ship after narrowing its quarterly loss as attendance rose. TheStreet's Keris Lahiff reports from Wall Street.