To be fair in this subfield even the articles written by real humans are often speculative at best. Stock markets are influenced by millions of individual decisions (most of which are in themselves carried out by digital algorithms) and there isn’t a single narrative responsible for a stock’s course. It’s much like the weather in that regard.

The development is certainly extant though. In newspapers many of the shorter, repetitive snippets have been machine generated for a long time now. I’m talking about summaries of sports matches with sentences like "but then just before half time scored to . You just feed the program a table with who scored goals at which minute and it generates it for you.