Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Online stock screener to find stocks that are negatively correlated to another stock/index? 
SeekingAlpha has a section dedicated to Short ETFs as well as others. In there you will find SH, and SDS.  Both of which are inverse to the S&P 500.  Edit: I linked to charts that compare SH and SDS to SPY.