The bid-ask spread is the price difference between the maximum amount a buyer is willing to pay for an asset and the minimum amount a seller is willing to accept.
Understanding market mechanics
In financial markets, every transaction requires a buyer and a seller. The buyer declares a price they will pay, known as the bid. The seller declares a price they will take, known as the ask. The gap between these two figures is the spread. Market makers facilitate these trades by providing liquidity. They buy at the bid price and sell at the ask price, keeping the difference as profit for their service.
For everyday Elephants placing market orders, the spread is a hidden transaction cost. When you buy an asset, you pay the higher ask price. If you immediately sell that same asset, you receive the lower bid price. A narrow spread indicates a highly liquid market with high trading volume. A wide spread indicates low liquidity or fewer active participants.
Market conditions directly influence the size of the spread. During periods of high volatility, market makers widen the spread to protect themselves from rapid price changes. Major global assets like large-cap equities or high-volume fiat currency pairs typically have very tight spreads. Smaller regional stocks or emerging market bonds often have wider spreads due to lower trading volumes across international exchanges.
Example
Imagine you are an Elephant trading shares in a multinational peanut distribution company. You look at the order book and see the current highest bid is 10.50 per share. This is the maximum another trader will pay to buy shares right now. The lowest ask is 10.55 per share, which is the minimum price a seller will accept to part with their shares.
The bid-ask spread in this scenario is 0.05 per share. If you place a market order to buy, you will pay 10.55. If you change your mind and immediately place a market order to sell, you will receive 10.50. The 0.05 difference goes to the market maker handling the transaction. To overcome this built-in cost and make a profit on your trade, the share price must rise by at least 0.06 before you sell.