Glossary term
Arrival Price
Arrival price is the market price or reference price at the time an order reaches the trading desk or execution algorithm, often used as a benchmark for implementation shortfall.
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What Is Arrival Price?
Arrival price is the market price or reference price at the time an order reaches the trading desk, broker, or execution algorithm. It is commonly used as a benchmark for measuring implementation shortfall and trading cost.
The arrival price marks the handoff from investment decision to execution. If the trade is completed later at a worse average price, the difference helps show how much cost emerged during execution.
Key Takeaways
- Arrival price is the benchmark price when an order arrives for execution.
- It is often based on the quote midpoint, last trade, or another defined market reference.
- It is central to implementation shortfall and transaction cost analysis.
- Arrival price helps separate investment decision quality from trading execution quality.
- The benchmark must be defined clearly before comparing execution results.
How Arrival Price Works
Suppose a portfolio manager sends an order to buy shares when the stock is quoted at a midpoint of $25.00. If the trading desk completes the order at an average price of $25.12, the trade cost relative to arrival price is part of the implementation shortfall.
For a sell order, the direction is reversed. Selling below the arrival benchmark can represent a cost, while selling above it can represent a favorable execution result. The benchmark should be adjusted for order side and measurement convention.
Why It Is Used
Use | Purpose |
|---|---|
Implementation shortfall | Measures cost from decision or order arrival to execution. |
Broker review | Compares execution results across brokers or algorithms. |
Trading urgency | Shows whether waiting helped or hurt. |
Portfolio attribution | Separates trade execution drag from investment selection. |
Benchmark Discipline
Arrival price is useful only when it is defined consistently. A midpoint, last sale, primary exchange quote, consolidated quote, or closing price can produce different measurements. The chosen benchmark should match the trading objective.
Arrival price also does not explain why costs occurred. A poor result may reflect market impact, delay, volatility, insufficient liquidity, or an unrealistic order size. It is the starting point for analysis, not the whole analysis.
Practical Interpretation
Arrival price is a useful discipline because it anchors execution review to the price available when the trade entered the process. That makes it different from a closing-price benchmark, which may reward or punish a trader for market movement that happened long after the order was released. The cleaner the timestamp and benchmark definition, the more useful the analysis becomes.
For example, a manager may decide to buy after a research call, but the market may move before the order is fully completed. Arrival price gives the team a fair starting point for measuring what the trading process added or subtracted from the investment idea.
The Bottom Line
Arrival price is the reference price at the start of execution. It helps investors measure what happened between the trading decision and the actual fill, especially inside implementation shortfall and TCA frameworks.