Wall Street indexes closed up today with the Nasdaq leading gains as investors bought heavyweight technology stocks and shrugged off the uncertainty of a potential U.S. government shutdown and hawkish remarks from Federal Reserve officials. “The market is not going to shoot to the moon, because this is a risk. Investors were also monitoring Fed policymakers’ commentary for any signs of concern over the potential loss of economic visibility should a shutdown materialize. On the Nasdaq, 2,525 stocks rose and 2,118 fell as advancing issues outnumbered decliners by a 1.19-to-1 ratio. On U.S. exchanges, about 17.91 billion shares changed hands compared with the 18.25 billion average from the last 20 sessions.