Short interest in Comfort Systems USA Inc (NYSE:FIX) increased during the last reporting period, rising from 760.74K to 898.80K. This put 2.95% of the company's publicly available shares short.

Based on the recent average volume of 383.89K shares traded per day, it would take 2.34 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.