Short interest at lowest since Feb 2007

This is quite an interesting piece of information, reported by Bespoke:

So, we are now in a situation where:

• Sentiment is more bullish since Feb 2007
• PER are at historical high levels
• Short interest is the lowest since Feb 2007
• We have reminiscences of '87
  

All these signals are extremely bearish, but of course, nothing could prevent the markets from bubbling like the Nasdaq in 2000.