Akero Therapeutics $AKRO is being bought by Novo $NVO It is up 16% today. Did someone know? Hard to say. But $AKRO gets very little options activity. Over the last seven days however, it got unusual levels of positive net premium call buying, way above its averages. What's more, the top chains were the $50 calls expiring in 99 days were being accumulated over the last month. You can track flows like this in real time using Unusual Whales.