A subset of options on futures has truncated strike prices within the MDP 3.0 market data Security Definition message. This truncation can occur in different message tags depending on the specific product.

Recommendations to Determine Full Strike Prices

CME Group strongly encourages clients to use tag 202-StrikePrice to determine the strike price.

However, it's important to note that for options on 2-Year T-Note futures, the strike price in tag 202-StrikePrice and/or tag 55-GlobexSymbol may be truncated.

For other options on futures, the truncated strike prices can be found in tag 55-Symbol of the market data Security Definition message.

When a strike price is truncated, clients are advised to apply specific rules to determine the full strike price based on whether the product is from CME or CBOT.

Rules for Resolving Truncated Strike Prices

For CBOT Products

The strike price in tag 202-StrikePrice and/or tag 55-GlobexSymbol may be truncated.

• If the truncated strike price ends in "2" or "7", postpend "5"

• If it ends in "1" or "6", postpend "25"

• If it ends in "3" or "8", postpend "75"

For CME Products

If the truncated strike price ends in "2" or "7", clients should postpend "5" to get the full strike price.

Products with Truncated Strike Prices Categorized by Exchange

CBOT Products - Truncated Tag 55-Symbol and/or tag 202-StrikePrice

• OZT (Options on 2-Year T-Note Futures)

• GT1-GT5 (2-Year Treasury Note Tuesday Weekly Options)

• HT1-HT5 (2-Year Treasury Note Thursday Weekly Options)

• VT1-VT5 (Weekly Monday Options on 2-Year T-Note Futures)

• WT1-WT5 (Weekly Wednesday Options on 2-Year T-Note Futures)

• ZT1 – ZT5 (Weekly Options on 2-Year T-Note Futures)

CBOT Products - Truncated Tag 55-Symbol

• OZQ (Options on 30-Day Federal Funds Futures)

• ZQ6 (One-Year Mid-Curve options on 30-Day Federal Funds Futures)

• ZQ1 (Two-Year Mid-Curve options on 30-Day Federal Funds Futures)

• OZF (Options on 5-Year T-Note Futures)

• ZF1 – ZF5 (Weekly options on 5-Year T-Note Futures)

• OZN (Options on 10-Year T-Note Futures)

• ZN1 - ZN5 (Weekly options on 10-Year T-Note Futures)

• WY1-WY5 (Weekly Wednesday options on 10-Year T-Note Futures)

• VY1 - VY5 (10-Year Treasury Note Monday Weekly Options)

• GF1-GF5 (5-Year Treasury Note Tuesday Weekly Options)

• GY1-GY5 (10-Year Treasury Note Tuesday Weekly Options)

• GX1-GX5 (Ultra 10-Year Treasury Note Tuesday Weekly Options)

• GB1-GB5 (U.S. Treasury Bond Tuesday Weekly Options)

• GU1-GU5 (Ultra U.S. Treasury Bond Tuesday Weekly Options)

• HF1-HF5 (5-Year Treasury Note Thursday Weekly Options)

• HY1-HY5 (10-Year Treasury Note Thursday Weekly Options)

CME Products - Truncated Tag 55-Symbol

• SR3 (Options on Three-Month SOFR Futures)

• S0 (One-Year Mid-Curve Options on Three-Month SOFR Futures)

• S2 (Two-Year Mid-Curve Options on Three-Month SOFR Futures)

• SR1 (Options on One-Month SOFR Futures)

• S3 (Three-Year Mid-Curve Options on Three-Month SOFR Futures)

• EJ (Options on Euroyen Futures)

• BTC (Options on Bitcoin Futures)

• HX1-HX5 (Ultra 10-Year Treasury Note Thursday Weekly Options)

• HB1-HB5 (U.S. Treasury Bond Thursday Weekly Options)

• HU1-HU5 (Ultra U.S. Treasury Bond Thursday Weekly Options)