Dow, S&P 500 hit records in volatile trading

http://finance.yahoo.com/news/futures-flat-investors-cautious-indexes-records-121916303–finance.html
By Yasmeen Abutaleb NEW YORK (Reuters) – U.S. stocks edged up in a volatile session on Thursday, with the Dow and S&P 500 hitting fresh record closing highs on an indication that the European Central Bank would take more policy action if needed to boost a struggling euro zone economy. Major indexes fluctuated between positive and negative territory throughout the day. Cyclical shares, ones tied to the pace of economic growth, were among the strongest. But weak results from Qualcomm pressured chipmakers. …