Nearly $16.1 billion in Bitcoin options expired on Deribit on Sept. 25 in a quarterly settlement event, although the reported figure represents open interest rather than the cash or Bitcoin transferred when contracts settled. Earlier Deribit data had put the combined Bitcoin and ether expiry near $16 billion, including $14 billion in Bitcoin options and $2.1 billion in ether options. Greeks.live said 32% of Bitcoin options open interest and 40% of ether open interest were due to expire, with traders rolling a substantial share of positions into later maturities. Put/call ratios below 1 showed calls outnumbering puts in the relevant expiries, but did not determine post-settlement price direction.