According to Deribit data, about $3.3 billion in notional Ethereum options are set to expire at the end of April, with about two-thirds of that used in calls, or bullish bets on prices. “The concentration of call options between $3,700 and $4,000 shows an upside bias and underlying bullish sentiment in the market,” said Jake Ostrovskis, an over-the-counter trader at Wintermute. The put-to-call ratio for Ethereum expiring at the end of April is currently 0.45, according to Deribit data. A ratio below 1 indicates that call option volume exceeds put option volume, indicating bullish market sentiment.