Why Cleanaway, IRESS, Omni Bridgeway, & Polynovo shares are dropping

In afternoon trade, the S&P/ASX 200 Index (ASX: XJO) is back on form and on course to end the week on a positive note. At the time of writing, the benchmark index is up 0.4% to 7,399.4 points.

Four ASX shares that have failed to follow the market higher…