The most recent short interest data has been released by the NASDAQ for the 06/13/2014 settlement date, which shows a 3,181,609 share decrease in total short interest for Idenix Pharmaceuticals Inc (IDIX), to 16,866,953, a decrease of 15.87% since 05/30/2014. Total short interest is just one way to look at short data; another metric that we here at Dividend Channel find particularly useful is the "days to cover" metric because it considers both the total shares short and the average daily volume of shares traded. The number of shares short is then compared to the average daily volume, in order to calculate the total number of trading days (at the average volume) it would take to close out all of the open short positions if every share traded represented a short position being closed. Average daily volume for IDIX at the 06/13/2014 settlement increased to 7,558,808, as compared to 956,000 at the 05/30/2014 report. That brought "days to cover" down to 2.23, a 89.36% decrease from the 20.97 days to cover calculated at the previous short interest data release.

The below chart shows the historical "days to cover" for IDIX at previous short interest release dates:

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A decreased "days to cover" value could indicate that short sellers are no longer expecting the same decline in stock price they once were, or it could also indicate a long bet elsewhere was closed where IDIX had been shorted as a hedge.

The chart below shows the one year performance of IDIX shares, versus its 200 day moving average. Looking at this chart, IDIX's low point in its 52 week range is $2.93 per share, with $24.21 as the 52 week high point — that compares with a last trade of $24.05.

Idenix Pharmaceuticals Inc Chart

According to the ETF Finder at ETF Channel, IDIX makes up 9.42% of the PowerShares Dynamic Biotechnology & Genome Portfolio ETF (PBE) which is up by about 0.7% on the day Wednesday.

In afternoon trading Wednesday, IDIX was up about 0.1% on the day.