An important trading session tomorrow.

The second quarter got off to an unpleasant start for the bulls, as the S&P 500 sank by more than 2% to close near the interim lows logged on Feb. 8, setting up an important session tomorrow with either a bounce or fresh lows.

One idea about an edge ?

Today, stocks were hammered, with the S&P 500 breaking to fresh lows into the bell to finish more than 2.5% in the red.

Treasurys were bid across the board to leave yields sharply lower. The dollar trended higher throughout the day to reverse overnight weakness.  The VIX jumped by more than 30%, and settled above 24, its highest close since the immediate aftermath of the short-vol-blowup on Feb. 13. 

The Fed is set to conclude its two-day meeting tomorrow, futures place the odds of a rate hike at 100%.