Dow flat as oil skids; S&P, Nasdaq boosted by health

Oil fell nearly 4 percent on signs that leading oil exporters were struggling to agree on a deal to cut production ahead of an OPEC meeting on Wednesday. The S&P energy index dropped 1.75 percent, leading the decliners among the 11 major S&P sectors. The stocks were among the biggest drags on the Dow and the S&P.