Registered Competitive Market Maker (RCMM) Identifies NYSE floor members with a specific Exchange-imposed obligation to enhance the quality of NYSE markets by injecting their own or their firms' capital into difficult market-making situations. At the request of an Exchange official, an RCMM must make a bid or offer that narrows an existing quote spread or improves its depth. An RCMM may also be asked to assist a commission broker or floor broker in executing a customer's otherwise a non-executable order.