Market price is the current price at which an asset can be bought or sold in an open market. For a listed security it usually means the price of the most recent trade, or the current best bid and offer quoted on an exchange. It is set by the interaction of buyers and sellers rather than by the issuer, and it changes continuously while the market is open.
Market price is one of several measures of what something is worth. It can differ from an asset's book value, from an analyst's estimate of intrinsic value, and, for funds, from net asset value (NAV). The gap between market price and NAV is central to how exchange-traded funds (ETFs) and closed-end funds are judged.
Market price in plain terms
Think of a farmers' market at the end of the day. A box of strawberries may have a price written on a card, but what matters is what a buyer is actually willing to pay right now and what the seller will accept. If many shoppers want strawberries, the price rises; if the stalls are full and few people are buying, it falls.
The market price of a share works the same way. It is not a fixed label but the latest point where a buyer and a seller agreed. A minute later, with new buyers, sellers or news, the agreed price can be different.
How market prices are formed
On an exchange, buy and sell orders meet in an order book. The highest price a buyer is offering is the bid; the lowest price a seller will accept is the ask, or offer. A trade happens when the two meet, and that trade price becomes the last-sale price shown in quotes. A market order executes immediately at the best available price, while a limit order waits for a specified price. Market makers post bids and offers to keep trading continuous, earning the spread between them.
In the United States, Regulation NMS, adopted by the Securities and Exchange Commission (SEC) in 2005, links the various trading venues and generally requires brokers to avoid trading through better-priced quotes displayed elsewhere. The best bid and offer across all venues is known as the national best bid and offer (NBBO). The midpoint between bid and ask is often used as a fair reference price, much like the mid-market rate in currency markets.
The process by which these prices adjust to new information is called price discovery. Its quality depends on liquidity and trading volume: in a deep market the quoted price is reliable and the spread narrow, while in a thin one a single trade can move the price sharply.
For an ETF, the market price is what investors pay on the exchange, while NAV is the per-share value of the fund's holdings, struck once a day. Arbitrage by authorised participants, who can create or redeem ETF shares in large blocks, usually keeps the two close. When the market price is above NAV the ETF trades at a premium; below it, at a discount. The SEC's ETF rule (Rule 6c-11, adopted in 2019) requires ETFs relying on it to publish on their websites the prior day's NAV, market price and premium or discount, plus historical data on premiums and discounts and the median bid-ask spread.
A closed-end fund issues a fixed number of shares that trade on an exchange without regular redemption at NAV, so its market price can stay well below or above NAV for long periods. An ordinary mutual fund has no separate market price: investors buy at NAV (plus any sales charge, giving the public offering price (POP)) and redeem at NAV.
Uses of market price
- Valuation of holdings. Under mark-to-market accounting, securities are carried at their market price, and a fund's NAV is built from the market prices of its holdings.
- Company size. Market capitalization is the market price per share multiplied by shares outstanding.
- Ratios. Measures such as the price-to-earnings ratio (P/E) and dividend yield use the market price as their price input.
- Bonds. Bond prices are quoted as a percentage of par value; a bond trading above par is at a premium, below par at a discount.
Limitations
Market price reflects what the most recent buyers and sellers agreed, which may not equal long-term value; prices can overshoot in either direction, and they can be distorted by market manipulation or by trading halts. For illiquid assets there may be no recent trade at all, so a "market price" is really an estimate. The figure is also a snapshot: the next trade, especially for a large order, may happen at a different price. Tracking that price over time, for example against its 52-week high and low, gives more context than a single quote.