Your day-ahead look for Oct. 21, 2026 This is an excerpt from CoinDesk newsletter 'Daybook.' Sign up here , if you haven't already. Bitcoin BTC $83,333.91 options are taking a bigger share of the largest cryptocurrency’s derivatives market in a sign that trading is becoming more sophisticated. According to Volmex , the issuer of the bitcoin volatility index BVIV, options accounted for just under 60% of open interest among all bitcoin derivatives last week. That’s up from around 5…
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