Moral suasion is persuasion of a person or a group to act in a certain way through persuasion or threats. In economics, it is used in reference to central banks.

Mass customization is the process of producing and delivering wide-market goods and services modified for a group of specific customers’ needs.

Market depth is market's ability to serve large market orders without ever altering the price of the security. 

A mature industry is an industry that passed both emerging and growth phases of industry growth.

Market exposure is the dollar-worth amount of funds, or percentage of portfolio, invested in one type of security, market sector or even a particular industry. It is usually expressed as a percentage of total portfolio holdings.

Market efficiency is the degree to which market prices reflect all available and relevant information.

A money market fund is a mutual fund that makes investments only in high liquidity instruments, for example, cash and/or cash equivalent securities. 

Money market is a trade in short-term debt investments. At wholesale level it involves large-volume trades between institutions and common traders.

A melt up is an unexpected improvement in the investment performance of an asset, driven by a slew of investors who don't want to miss out on its rise. 

A mean is a simple mathematical average of two or more numbers.