Why 4DMedical, Iluka, Medibank, and Pilbara Minerals shares are sinking today

The S&P/ASX 200 Index (ASX: XJO) is having a better session on Wednesday. In afternoon trade, the benchmark index is up 0.3% to 8,828.3 points.

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