U.S. stocks added to modest gains through the morning session as a mix of earnings reports rolled in. Both the S&P 500 and Nasdaq notched new intraday record highs. Twilio  (TWLO - Get Report) reported an above-consensus quarterly performance in its first release as a public company. The cloud-communications developer reported an adjusted net loss nearly half what analysts expected. Norweigan Cruise Line (NCLH - Get Report) tumbled after issuing disappointing guidance for its full year. North American demand for European cruises has been under pressure on fears over terrorism. The cruiseliner's second quarter also came in short estimates. Buffalo Wild Wing s (BWLD) was upgraded to NEUTRAL from UNDERPERFORM at Credit Suisse. The firm said activist shareholders could push for restructuring at the chain. TheStreet's Keris Lahiff reports from Wall Street.