The wheels are coming off

The S&P 500 was up 8 points earlier in the day but had been bobbing and neared unchanged a few times in choppy trading.

In the past hour it broke to a session low and then into negative territory. It's continued to slide down to 2046. Yesterday's low of 2045 is key near-term support.

FX is largely unmoved but oil has been in a steady slide as well and commodity currencies are near the lows of the day.