Stocks stayed well underwater in early-afternoon trade Tuesday following the long Memorial Day holiday weekend. But one medical large-cap name refused to fall and is trying to break out. The S&P 500 was down 0.9%, treading near the lows of the day. It would be the biggest drop since a 1.2% slide on May 5. The Dow industrials were also off 0.9% while the Nasdaq composite slid 1.1%.