Sono-Tek Sees Sharp Decline in Short Interest for February Sono-Tek Corporation experienced a significant 35.6% drop in short interest during February, with shares sold short decreasing to 6,500. This decline reflects investor sentiment, as the short-interest ratio now stands at 0.4 days. Analysts continue to monitor the stock, which has a 12-month price range between $3.50 and $6.05.12