NEW YORK — Stocks drifted to a mixed finish Monday, as Wall Street waited for the results of a pivotal meeting meant to avoid a potentially disastrous default on the U.S. government’s debt.

The S&P 500 was at a virtual standstill after flipping between small gains and losses through the day. It edged up by 0.65, or less than 0.1%, to 4,192.63. The Dow Jones Industrial Average fell 140.05 points, or 0.4%, to 33,286.58, and the Nasdaq composite rose 62.88, or 0.5%, to 12,720.78.