Bid-Ask Spread

When you place a market order to buy a share or an ETF unit, you transact at the ask price - the price sellers are currently offering. When you sell, you transact at the bid price, which is lower. The spread is the gap between the two, and it is an immediate, unavoidable cost that shows up before any broker commission is charged.\n\nSpreads are quoted in the currency of the security and also expressed in basis points (bps) - hundredths of a percentage point - relative to the mid-price. A liquid, heavily traded instrument such as a large-cap US equity ETF typically carries a tighter spread than a thinly traded single stock or a niche sector fund. Wider spreads indicate lower liquidity and higher implicit dealing costs.\n\nOn regulated exchanges - including the Dubai Financial Market and Abu Dhabi Securities Exchange, both overseen by the Securities and Commodities Authority (SCA) - market makers or designated liquidity providers are often required to quote continuous two-sided prices, which helps contain spreads. On international platforms accessible to GCC residents and regulated by bodies such as the FCA (UK) or the DFSA (Dubai International Financial Centre), spreads on exchange-traded products are visible in the order book before you deal.

For expats in the GCC who invest regularly - for example, making monthly contributions into a UCITS ETF through an online broker - the spread is a per-transaction cost that compounds alongside any ongoing charges. A wide spread on a thinly traded fund can easily exceed the fund's annual Total Expense Ratio (TER) on a single round-trip trade, making fund selection and trading frequency genuine cost decisions, not just administrative ones.\n\nExpats who use UAE-based or internationally regulated platforms to access Gulf-listed equities should pay particular attention to spreads on individual stocks listed on the DFM, ADX, or Tadawul (Saudi Exchange, regulated under SAMA's capital markets framework via the Capital Market Authority). Liquidity on individual mid- and small-cap Gulf names can be materially lower than on equivalent European or US listings, meaning spreads can be wider. Where a passive UCITS index fund covering the same exposure is available, comparing the fund's TER plus its typical spread against the spread cost of trading individual stocks directly is a worthwhile exercise.