FX Option Expiry Cut Times: New York Cut vs Tokyo Cut

Foreign exchange options traded over-the-counter have two main daily expiry windows: the New York cut (10 a.m. EST) and the Tokyo cut (2 p.m. JST). At these moments, billions of dollars in option positions expire simultaneously, and the fx option expiry cut times create concentrated demand and supply at strike levels where dealers have sold options. Spot prices often gravitate toward these large strike concentrations as expiry approaches, a phenomenon known as pinning.

Why FX Options Have Daily Cut Times

Most over-the-counter currency options are cash-settled, meaning they expire at a reference rate—typically the spot exchange rate at a pre-announced “cut” time. Dealers and brokers coordinate on two standard windows (New York and Tokyo) to synchronize expiry across the globe. This avoids fragmentation and ensures a single, agreed-upon settlement price.

The New York cut is the largest for US dollar pairs (EUR/USD, GBP/USD, etc.) because the bulk of currency trading happens during North American hours and most USD deals reference New York convention. The Tokyo cut matters most for Asian pairs (USD/JPY, AUD/USD, etc.).

Some regional pairs have a London cut (11:00 a.m. GMT), but it is less dominant than the two main windows.

Strike Clustering and Pinning

For any expiring day, dealers sell many options at multiple strikes. On a single USD/EUR pair, there might be open interest (number of outstanding contracts) at 50 or 100 different strikes. The larger strikes—round numbers like 1.0500, 1.0600, 1.0700—attract far more volume because traders and hedgers prefer round figures for mental accounting and risk targets.

As the cut time approaches, spot price often drifts toward the strike level with the highest dealer short interest. This happens for two reasons:

1. Gamma hedging: A dealer short a call or put needs to hedge delta continuously. As spot moves toward a strike, the dealer’s position requires adjustment. Collectively, dealers may be forced to buy or sell to hedge, moving the spot price toward the large strike.

2. Option decay: As an option approaches expiry, its time value decays rapidly. Options near-the-money lose value fastest. Traders holding profitable out-of-the-money positions may liquidate early, rather than risk pinning.

The result: spot price “pins” toward large strikes. If a strike has $1 billion of short call open interest, the spot price has a good chance of expiring exactly at or very close to that strike. This is not a market anomaly; it is a natural consequence of billions of dollars in hedging flows converging at expiry.

Implications for Spot FX Traders

For traders in the spot market, the pin effect creates predictable short-term volatility. In the hours before New York cut:

• If spot is near a large strike, it may trade sideways or even reverse as dealers and hedge funds position ahead of expiry.
• If spot is far from the next strike, it may drift toward it gradually.
• Volatility often compresses as expiry time nears, making it harder for day traders to profit on intraday moves.

Large moves often happen after cut time, once the expired options stop constraining the market. Spot can gap sharply once the pinning pressure vanishes.

How Traders Monitor Cuts

Professional traders use a few tools to track FX option expiry:

• Strike ladder charts: Plot the spot price against all nearby strikes with open interest quantities. This shows where the largest concentrations sit.
• Dealer flow reports: Brokers and over-the-counter market participants publish estimates of dealer gamma hedging flows ahead of large expirations.
• Event calendars: Traders mark cut times on daily calendars and watch for the hour leading into them.
• Volatility surface monitors: The implied volatility of options at different strikes changes as expiry approaches; unusual moves suggest unusual gamma flows or dealer positioning.

Strike Level Conventions

Traders also care about the psychological round-figure preference. A strike at 1.0500 (50 pips on some pairs) is ten times more common than 1.0513. Dealers price these strikes tighter (lower bid-ask spread) because volume is higher. As a result, end-of-day risk and dealer hedging gravity is concentrated at these round numbers.

The minute a strike level becomes significant (high open interest), the spot price is more likely to move toward it than away. Conversely, spot prices are less likely to move through a large strike without hesitation, because the hedging flows work against such moves.

Central Banks and Corporate Hedging

Central banks and large corporations are major option buyers on FX markets, especially around expiry. A corporation with a quarterly earnings announcement might buy put options on a foreign currency to hedge its export revenues. These positions expire on specific cuts. The bank then sells the opposite contract to delta-hedge, creating concentration at that strike.

During periods of currency volatility or geopolitical tension, central banks may also be active buyers ahead of known risk events. Their hedging flows can amplify the pinning effect around large strikes.

Time Decay and Volatility Smile

As expiry approaches, theta (time decay) accelerates. An option worth $0.005 in price might lose half its value in the final hour before cut. Traders holding underwater positions often close them minutes before expiry rather than risk gap moves.

The shape of the volatility smile also matters. Out-of-the-money options become worth almost nothing near expiry, so their implied volatility can jump if dealers’ hedging needs spike. In-the-money options hold intrinsic value, so they are more stable.

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