Glossary term
Order Routing
Order routing is the process a broker uses to send a customer order to an exchange, market maker, wholesaler, alternative trading system, or other venue for execution.
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What Is Order Routing?
Order routing is the process a broker uses to send a customer order to an exchange, market maker, wholesaler, alternative trading system, or other venue for execution. Routing determines where the order is handled, how it may interact with available liquidity, and what execution quality the customer may receive.
The term matters because routing is not just plumbing. A broker may have choices across venues with different prices, rebates, fees, speed, liquidity, and payment-for-order-flow arrangements.
Key Takeaways
- Order routing determines where a broker sends an order for execution.
- Routes can include exchanges, wholesalers, internalizers, alternative trading systems, or other market centers.
- Routing choices can affect price improvement, execution speed, fill likelihood, and trading costs.
- Broker-dealers still have best execution obligations when routing customer orders.
- Rule 606 disclosures help investors see general routing practices and certain routing-related economics.
How Routing Works
When an investor enters an order, the broker's systems decide where to send it based on order type, security, size, market conditions, venue access, routing logic, and sometimes customer instructions. A marketable order may go to a wholesaler or exchange for immediate execution. A limit order may be posted, routed, or held depending on its price and instructions.
For institutional orders, routing can be more complex. A broker or algorithm may split the order across venues, work it over time, seek hidden liquidity, or balance speed against market impact.
Routing Factors
Factor | Why it matters |
|---|---|
Price improvement | Can reduce the cost of a marketable order. |
Execution speed | Affects whether a trade happens before prices move. |
Fill likelihood | Matters for limit orders and less-liquid securities. |
Venue fees or rebates | Can create routing incentives that need disclosure and supervision. |
Payment for order flow | Can create a conflict between broker economics and customer execution quality. |
What Investors Can Review
Investors usually cannot see every routing decision in real time, but they can review brokerage order routing disclosures, execution quality statistics, and confirmations. The useful question is whether the broker's routing practices are consistent with high-quality execution, not simply whether trades are commission-free.
Routing also interacts with order instructions. A customer-directed route, a market order, a marketable limit order, and a nonmarketable limit order can each change the broker's options and the execution result.
Practical Interpretation
For a household investor, the important point is that the displayed commission is only one part of trading cost. A zero-commission broker can still route orders in ways that affect price improvement, speed, and fill quality. For an institution, routing analysis is even more sensitive because order size can reveal information and move prices before the trade is complete.
The Bottom Line
Order routing is the path a trade takes from a broker to an execution venue. Good routing should support best execution by balancing price, speed, liquidity, likelihood of execution, costs, and customer instructions.