ChainCatcher message, as optimism surrounding the potential approval of Ethereum spot ETFs reignites, an analyst stated that Ethereum call options across all expiration dates are now more expensive than put options, indicating a bullish market sentiment.Deribit CEO Luuk Strijers stated in an email: "The skew for all expiration dates of put and call options is negative, and it further increases after the June expiration, which is quite a bullish signal— the basis spread has also increased to about 14% annualized, another bullish indicator."His analysis indicates that traders are willing to pay higher premiums for call options, especially for options expiring at the end of June and beyond. This could be a bullish market indicator as it suggests that traders expect Ethereum prices to rise in the future. Therefore, they are less willing to pay higher premiums for put options as downside protection.