REFRRESEARCH FRONTIERS INC— option chain

Every listed call and put by expiration: bid/ask, last trade, implied volatility, delta, open interest and volume, with the put/call and max-pain overview up top. Every figure is relayed verbatim from the delayed Cboe snapshot — fields the feed omits stay blank, never faked as 0.

Cboe 지연 옵션 데이터(~15분). 호가, IV, 그릭스는 참고용 스냅샷이며 실시간 체결 가능 가격이 아닙니다.

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