Invesco ETF Sees Surge in Short Interest The Invesco BulletShares 2026 Municipal Bond ETF experienced a significant rise in short interest in February, up 94.7% from January. Short interest reached 29,200 shares compared to 15,000 previously. Despite this, the ETF maintains a steady price range, with a 52-week low of $23.36 and a high of $23.85.1