With the launch of the NYMEX miNY ^® futures on the CME Globex platform, a new Lead Market Maker (LMM) allocation algorithm was introduced, the NYMEX LMM algorithm. A table illustrating this allocation is available below.

The Matching Algorithm Indicator value N, at position 685 of the Instrument Creation (MO [m-oh]) message, designates the NYMEX LMM allocation. The NYMEX LMM allocation algorithm is only active 5:00 p.m. - 4:15 p.m. Central time (CT), when the market is Open as indicated with the value A in position 86-87 of the Instrument Status (MG) message.

Although multiple LMMs can be designated per instrument, there is one LMM allocation percentage per instrument. All LMMs with orders at the best prices in the market will receive equal portions of the LMM allocation percentage. An LMM may have multiple orders on the same side of the market for the instrument.

Currently calendar spreads do not support the NYMEX LMM allocation. The NYMEX LMM algorithm is supported in implied markets.