NOPE — Net Options Pricing Effect

NOPE — the Net Options Pricing Effect — is Unusual Whales' intraday indicator for how much the options market is pushing the underlying around through dealer delta-gamma hedging. UW: "NOPE is the Net Options Pricing Effect, which tracks the intraday net delta of any ticker, but most research has been done on indexes." It is reported per minute over the trading day and is meant to give a best-estimate of the expected hedging direction on the underlying.

The two assumptions behind NOPE

UW spells out the model's premises. First, "MM's take [the] short side of any call or put traded during the day" — market makers are assumed to be the counterparty to net options flow. Second, "MM's try to minimize risk by dynamically hedging their delta-gamma exposure, and do so by buying/shorting the underlying stock in proportion to the total net delta being traded." Putting those together: when traders pile into options, dealers must trade the underlying to stay hedged, and on very liquid tickers that hedging "can potentially drive the price of the underlying, to a certain extent. Large movements might exacerbate this real time hedging, and drive price movements further in respective directions."

The formula

UW gives the original calculation explicitly:

NOPE = (Call Delta − Put Delta) / Stock Volume

where, per UW, call/put delta "is obtained by multiplying each chain's volume with its latest delta and then summing those values up." So Call Delta is the sum over all call contracts of (contract volume × that contract's delta), Put Delta is the analogous sum over puts, and Stock Volume is "the cumulative total volume of the underlying stock traded." Dividing by stock volume normalizes the option-driven delta against how much the underlying is actually trading — it scales the option effect relative to the real liquidity that can absorb it. NOPE values are small decimals (UW's example shows −0.000648).

NOPE vs NOPE Fill

UW reports two variants. The plain nope score uses each contract's latest delta. The nope_fill variant uses "the delta at the time of the transaction" — that is, the delta when each trade actually printed, via call_fill_delta and put_fill_delta. NOPE Fill is therefore truer to the conditions under which positions were opened (and the hedging that would have followed), while plain NOPE re-marks everything to the current delta. Watching both can reveal whether the live picture has drifted from how the day's flow was actually transacted.

What NOPE estimates

In UW's framing, "NOPE represents a best-estimate of [the] expected number of shares to be hedged at any given time, and will show a general expected direction on the underlying." A strongly positive NOPE implies net call-delta buying that dealers must hedge by buying the underlying (supportive); a strongly negative NOPE implies the opposite hedging pressure. Because it is normalized by stock volume, the same raw option delta produces a larger NOPE on a thinly-traded session than on a high-volume one — the option flow has more relative power to move a quiet tape.

How to read the signal

NOPE is most informative at intraday extremes, where the model assumes dealer hedging is large enough to genuinely tilt the underlying. The classic use studied on indexes is as a mean-reversion/exhaustion gauge: an extreme NOPE reading suggests the options market's hedging demand has stretched price and may snap back. Per the broader UW/NOPE-chart commentary, "NOPE tends to skew bullish, as all markets do," and "during bearish signaling it becomes harder to predict" — so the indicator is generally more reliable flagging stretched-bullish conditions than calling tops in fear. It is built for liquid, heavily-optioned tickers (indices, mega-caps); on illiquid names the assumptions break down.

Caveats and common mistakes

NOPE is built on the same assumption-stack as GEX: that dealers take the short side of net flow and mechanically delta-gamma hedge. That is a reasonable model, not a measurement, so NOPE is an estimate of hedging pressure, not a guaranteed price predictor. Treating a single minute's NOPE as a trade trigger is a mistake — it is most useful at extremes and over the shape of the intraday curve, not tick by tick. It also says nothing on its own about the volatility regime; pair it with GEX (which tells you whether hedging dampens or amplifies moves) and with the underlying's own price action before acting.