Here’s why the Appen (ASX:APX) share price is down 21% today

It has been a bitterly disappointing day of trade for the Appen Ltd (ASX: APX) share price.

At the time of writing, the artificial intelligence (AI) data services company’s shares are down 21% to $11.67.

This means the Appen share price has now lost over half of its value since the start…