SPDR S&P 500 (SPY)

[risk on]

It's what VXX represents that matters to me. When put interest and premiums there in start jumping up on the S&P at the same time SPY price moves up, look out.

Saw the same thing here before, and it didn't end well.

Saw the same thing on TWTR apx 2 years ago, where in put premiums started soaring while price was going up, the three days that followed were carnage.