Why Appen, DroneShield, Gentrack, and New Hope shares are dropping today

The S&P/ASX 200 Index (ASX: XJO) is having a subdued start to the week. In afternoon trade, the benchmark index is down 0.1% to 8,334.2 points.

Four ASX shares that are falling more than most today are listed below. Here’s why they are dropping:

The Appen share…