S&P 500 climbs above the 100-day moving average at the open

S&P 500 jumps at the open

The S&P 500 is up 27 points to 2646 shortly after the open. That's slightly above the 100-day moving average, which is at 2640. That level will be a key one on the close.

The only shock today would be if there weren't any twists and turns.