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Option expiries at 10 a.m. New York: the pin that is not always there

Each day, a set of FX options expires at 10 a.m. New York time, called the NY cut. Large strikes near the current price can create a magnet effect, as dealers hedge their exposure by buying and selling the underlying.

When the open interest at a strike is large, price sometimes seems to gravitate toward it in the hours before the cut and hover around it. After the expiry, the magnet disappears and price often moves freely.

For scalpers, it is a possible context clue. A pair hovering strangely close to a round strike on a day with big option interest is probably under hedging pressure. Breakout setups in that window have lower success rates, and mean reversion setups sometimes do better.

The catch is information. Retail traders do not have a view of the option book. Some brokers and data providers publish a list of expiries each day, and those are worth checking.

The pinning effect is not guaranteed. It depends on the size of the options relative to the spot market on a given day.

Have expiry strikes been checked against price behaviour on days when big expiries were listed?

I tried tracking this for a couple of months using the expiry list my broker publishes each morning. I only paid attention to strikes listed as large and within about twenty pips of price at the start of New York. On those days EURUSD did tend to drift toward the strike and then sit near it, not every time, but often enough to notice.

What helped me most was simply avoiding breakout trades in that window. Twice I watched a perfectly good looking breakout fade straight back toward the strike, which would have been an easy loss. After the 10 a.m. cut, the pair often moved off cleanly, and some of my better trades of the day came in the half hour after.

I wouldn't trade the pin itself, because the information is too patchy and the size needed to matter is never clear. As a filter for when not to chase, though, it has earned its place.

FX options expire at specific times, and the most important daily cut is 10am New York. Large option positions at popular strikes can create something like a magnet effect as expiry approaches.

The mechanism is hedging. Dealers who sold options hedge by trading the underlying currency. As price nears a heavily populated strike, the hedging flows tend to push against moves away from it, so price can stall or oscillate around that level into the cut.

Scalpers see it as strange behavior: a pair refusing to break a level despite news, then moving abruptly after 10am when the pressure disappears.

Sizeable expiries are often reported in market commentary the day before, listing strikes and notional amounts. It isn't always reliable, since only part of the picture is visible.

The effect shows up most when the expiry is large relative to normal daily volume and when spot is already close to the strike. Otherwise the effect is minimal.

A practical angle is to be cautious about breakout scalps in the final thirty minutes before the cut when a big strike sits nearby.

Strike information has limits. Large expiries are known to those who trade options and publish them, but the final positioning depends on what has been hedged, rolled, or closed. A barrier option near a level matters in a very different way from a plain vanilla expiry.

An interesting detail: the pull of a strike is strongest when spot is within a few pips of it and the amount is large. On a day with no large strikes nearby, the 10am cut passes quietly. On a day with a multi-billion expiry sitting ten pips from spot, price may crawl and stall for an hour.

A scalper can keep a short note each morning listing any strikes within thirty pips of spot. After a couple of months, the notes show whether the pin effect has been real in the pairs being traded.

Does anyone track option expiries, and does the pin effect actually show up in the tick data?