This reminds me of the recent Tesla April Fools press release for a new watch called the 'Model W'. Clearly there were bots written to monitor Tesla feeds and other companies for new products and trade automatically as the stock price jumped $2, before returning back to normal by the end of the day.
That's called "pump and dump", and I believe it is illegal.
They can send the bots to jail.
Also, it's very easy to use a whitelist of twitter accounts.
I imagine these bots only follow reputable news sources.