Definition
Best Execution
Best execution is the obligation on a broker or fund to take all reasonable steps to obtain the most favourable terms for a client's order, considering price, cost, speed, likelihood of execution and settlement.
In India, SEBI's intermediary regulations and exchange rules require brokers to act in the client's interest and not disadvantage them, particularly when offering Smart Order Routing across NSE and BSE. Best execution is not simply the best headline price; it balances price improvement against the certainty and cost of getting filled.
For institutional mandates, best execution is evidenced through Transaction Cost Analysis and documented routing policies. It underpins the design of execution algos, which must be able to demonstrate that their order-handling logic seeks favourable outcomes rather than benefiting the broker.
Related terms
- Direct Market Access (DMA)Direct Market Access lets institutional clients route orders straight to the exchange order book using a broker's infrastructure and exchange membership, without manual broker intervention on each order.
- Smart Order Routing (SOR)Smart Order Routing is technology that automatically scans multiple trading venues and routes each order, or parts of it, to the venue offering the best available price and liquidity at that instant.
- Execution AlgorithmAn execution algorithm is a program that works a large parent order into many smaller child orders over time to minimise market impact and achieve a target benchmark such as VWAP or the arrival price.
- Transaction Cost Analysis (TCA)Transaction Cost Analysis is the post-trade measurement of execution quality, comparing realised fill prices against benchmarks such as arrival price or VWAP to quantify explicit and implicit costs.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.