Ether’s one-month call-put skew, an options market measure of sentiment, has turned negative, hinting at the relative richness of puts, or options used to protect against bearish price trends. The 60-day gauge has also flipped in favor of put options, while the 90-day and 180-day metrics remain positive, according to crypto options flow on Deribit tracked by Amberdata. Deribit is the world’s leading cryptocurrency options exchange, accounting for over 85% of the global activity.