Snap Inc SNAP.K gained 2.8% after launching an in-app tool to educate users about the dangers of drugs. By Shreyashi Sanyal Oct 7 (Reuters) - U.S. stocks rose on Thursday after a temporary truce in the debt-ceiling standoff in Congress relieved concerns of a possible government debt default, while a dip in oil prices eased worries of higher inflation. Top U.S. Senate Republican Mitch McConnell on Wednesday floated a plan to support an extension of the federal debt ceiling into December, potentially heading off a historic default.