Why 4DMedical, DroneShield, Ramsay, and Saturn Metals shares are sinking today

In afternoon trade, the S&P/ASX 200 Index (ASX: XJO) is on course to record a strong gain. At the time of writing, the benchmark index is up 1% to 8,935.9 points.

Four ASX shares that have failed to follow the market higher today are listed below. Here’s why they are…