S&P closes at record, Nasdaq hits 15-year high

By Sinead Carew NEW YORK (Reuters) - The S&P 500 index closed at a record high on Friday, as energy shares gained with oil prices, while the Nasdaq composite index hit a 15-year high helped by technology stocks. The Nasdaq had the strongest gains of the three main indexes on Friday. A strong report by Cisco Systems Inc earlier in the week led some investors to conclude that technology demand is improving, said Peter Jankovskis, co-chief investment officer at OakBrook Investments LLC in Lisle