Data from Artemis shows that Kalshi’s weekly Open Interest (OI) reached a new high this past week with $810 million. That’s around a 28% increase from the previous week and beating the highs that were set in mid may. The number carries more weight rather than a raw volume print would. Volumes can spike and disappear within a day. OI, on the other hand, highlights money that’s parked and stays. In Kalshi, this metric has been growing rapidly.