Interesting – but it wouldn’t be insider tweeting, assuming the tweets are publicly visible.
Commodity traders are following farmers on Twitter, hoping for clues about crop forecasts and such.
Last week Grisafi started receiving tweets from European farmers saying the weather was hotter and drier than weather reports indicated. He’d been short the wheat market on the assumption that prices would fall. After reading the tweets, however, he realized the commodity might be in shorter supply than the market expected and got out of his position, avoiding a loss as prices rose.