The S&P 500 recently came in touch with the neutral line, but it failed to extend the move. That has invited some renewed selling interest, which has dropped the benchmark Index back to a narrow loss.
The stock market's recent climb coincided with a pullback by the dollar. The dollar had been up above its 50-day moving average to a monthly high earlier this morning, but it has had a hard time holding on to gains. A recent slip has left the Dollar Index down with a 0.1% loss.
Improvement among commodities has also come amid the dollar's downturn. The CRB Commodity Index was down about 1% a couple of hours ago, but now it is off by only 0.3%