Why ARB, Rhythm Biosciences, Sezzle, & Spark shares are storming higher

In afternoon trade, the S&P/ASX 200 Index (ASX: XJO) is on course to record a small decline. At the time of writing, the benchmark index is down 0.25% to 7,334.5 points.

Four ASX shares that are not letting that hold them back are listed below. Here’s…