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Friday, July 4, 2008

S&P500 Short Interest Ratio

Back in March I published some data on the NYSE top 100 short interest ratio (SIR), and a lot of people seemed to enjoy it. I am now following that up with June SIR data for all the S&P500 companies. I broke out the data alphabetically, descending SIR, and by the monthly change of the short interest ratio. Please follow the links below for the tables.

Sorted By:
Company Name
SIR Largest to Smallest
SIR Change (6/30/08-6/15/08)


How might this be helpful? Well besides giving investors an idea of market sentiment on specific securities or sectors; it also creates the opportunity for a potential short squeeze. A short squeeze is when investors cover their short positions in order to stop losses by purchasing the equities on the open market, in theory bringing up the securities price. So, the higher the SIR the higher the potential magnitude of a short squeeze. The Short interest ratio is the amount of days it would take to cover the equities total short interest given its average daily trading volume.

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