Definition
Market Maker
A market maker continuously quotes both buy and sell prices for a security, providing liquidity and profiting from the bid-ask spread.
Always a price on both sides
A market maker is a firm or individual that stands ready to both buy and sell a security at quoted prices throughout the trading day. By guaranteeing a counterparty, the market maker ensures you can trade even when no natural buyer or seller is around at that exact moment. Its reward is the bid-ask spread: it buys at the slightly lower bid and sells at the slightly higher ask, pocketing the difference.
The more competition among market makers, the tighter the spread, which lowers the cost of trading for ordinary investors.
How India regulates it
In liquid large-caps on the NSE and BSE, market making happens informally through brokers and high-frequency algorithms. But India also has a formal, mandatory version. Under Regulation 261 of SEBI's ICDR Regulations, 2018, market making is compulsory for SME IPOs.
There, a SEBI-registered broker empanelled with NSE Emerge or BSE SME must provide two-way quotes for a large part of each trading day, beginning at listing and continuing for a minimum of three years. Without this obligation, thinly traded small-company shares could become almost impossible to sell.
Why it matters to you
Market makers are the plumbing of the equity market. Their constant quotes are why you can hit buy on a liquid stock and get filled instantly at a price close to the last trade. In illiquid counters, the absence or thinness of market making shows up as a wide spread, meaning you pay a hidden cost every time you enter or exit.
For an investor the practical signal is simple: a narrow, stable bid-ask spread usually means deep liquidity and easy exit, while a yawning spread is a warning that getting out may cost you, especially in SME and small-cap names.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.