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.

Datos de opciones con retraso de Cboe (~15 min). Las cotizaciones, la IV y las griegas son instantáneas indicativas, no precios negociables en vivo.

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