The S&P 500 opened 12 points lower to 1817. The key level is the January low of 1815.52. Expect more selling on a break and that will spill over to USD/JPY.
S&P 500 daily chart
Technically, the situation is very similar to USD/JPY, which broke the January low earlier today.
Update: That didn’t take long. Fresh low for January at 1814.
The real pain is in emerging market stocks (along with Spain).
Emerging market indexes. BIST is Istanbul, WIG is Poland