The BATS Exchanges

Quality Markets with Deep Liquidity

Driven by its mission of "Making Markets Better," BATS has become synonymous with great technology, aggressive pricing and outstanding customer service while catering to the needs of the broker-dealer and trading community.

Below is information about trading on our equities exchanges. For more information on BATS Listings, visit the Listings tab.

While we are still in the integration process with Direct Edge, if you are interested in order and routing strategy or market data information for EDGA and EDGX, please review: EDGA and EDGX Product Offerings or Direct Edge Market Data.

Order Books

BATS operates two stock exchanges in the U.S., the BZX Exchange and the BYX Exchange (The BATS Exchanges), which currently account for about 11-12% of all U.S. equity trading on a daily basis.

The Definitions & Order Types document contains brief descriptions of each of our order types and routing instructions.

Market Data

BATS provides free and value-added market data feeds to suit Members' diverse needs.

View our Market Data Products page for descriptions of the feeds available. Market Data specifications are available on the Support tab.

Order Router

BATS offers routing strategies that provide access to multiple pools of liquidity. Descriptions are available by expanding each heading.

Parallel Routing Strategies – Route to Multiple Venues Simultaneously

Parallel D targets the best price by splitting a routable order and sending it to multiple market centers simultaneously at the same price level. Liquidity is exhausted at each price level to the limit price.

Parallel 2D provides a faster execution than Parallel D. It splits a routable order and sends it to multiple market centers and multiple price levels simultaneously.

Parallel T accesses top of book liquidity only. Splits a routable order and sends it to multiple market centers executing against only the protected (top) quotes to the limit price. All parallel smart order routing strategies may be combined with BATS’ DRT strategy to access pools of hidden liquidity in addition to protected market centers.

DRT – Dark Routing Technique

DRT is a dark routing technique that routes to dark pools offering potential price improvement and lower access fees. The DRT functionality routes to participating Dark Liquidity Partners (DLPs) after accessing the BATS order book and before routing to protected markets using the BATS Parallel D strategy (described above). BATS will only maintain routing relationships with DLPs that provide quality executions in terms of meaningful fill rates and fast executions for BATS Members. As always, full anonymity is maintained for orders routed to DLPs.

DRT is available with any of BATS' routing strategies except directed Intermarket Sweep Orders (ISOs) and Parallel T.

Click here for detailed descriptions of each routing strategy.

TRIM & SLIM – Specialized Strategies to Minimize Price and Time

All securities supported by BATS are available to be accessed with the TRIM and SLIM routing strategies. Tape B and Tape C securities will not be routed to the NYSE.

TRIM – Route to Select Low-Cost Venues

TRIM orders first access low-cost market centers, e.g., BYX Exchange, NASDAQ BX, EDGA, etc. TRIM2 and TRIM3 are variations of TRIM that access even fewer low-cost market centers. These low-cost market centers are defined by BATS and are subject to change as markets make adjustments to their fee schedules. Next, TRIM orders access BATS’ DRT strategy, unless Members elect not to do so. The order accesses a second set of low-cost market centers, e.g., NYSE, before finally returning to the book of the originating exchange—BZX Exchange or BYX Exchange.

TRIM2 and TRIM3 offer variations of TRIM with fewer market centers. Click here for details.

Non-IOC TRIM orders will post on the originating exchange. For orders that originate on BZX Exchange, TRIM may optionally access the BZX Exchange order book first.

SLIM – Route to All Markets While Minimizing Fees

SLIM is similar to TRIM in that it seeks to minimize the cost of routing to away markets after accessing certain specified market centers, yet SLIM will route to all protected market centers.

Orders originating on BZX Exchange first scrape that order book before routing to BYX Exchange. Orders originating on BYX Exchange only scrape the BYX Exchange book in the order’s first step. The second step is to access low-cost market centers. Step three is to access DRT markets, unless Members elect not to do so. SLIM next routes to additional low-cost protected market centers before accessing all remaining protected market centers. Finally, the order returns to the originating exchange (BZX Exchange or BYX Exchange). Non-IOC SLIM orders post on the originating exchange.

SLIM+ – BZX Exchange-only Strategy

SLIM+ is identical to SLIM, except it first routes to BYX Exchange prior to accessing the BZX Exchange order book.


B2B gives Members the ability to route to both of the BATS Exchanges’ order books at-cost of the target platform. Orders will first check the originating order book (BZX Exchange or BYX Exchange). Optionally, DRT markets may be accessed next. Then any unexecuted portion of the order will route to the BATS sister exchange at-cost.

Re-Route – Aggressive Routing Strategy

Re-Route is designed to aggressively re-route and fill orders, where Parallel strategies could leave unfilled shares resting on the BATS book until they are matched with an incoming order to BATS.

By choosing Re-Route, orders come off the BATS order book and target a locking or crossing quote at another market center, matching or improving upon the limit price. This behavior occurs anytime BATS receives an updated quote from another market that locks OR crosses the order resting on the BATS book. Re-Routing may continue until the order is completely filled.

Ready to trade? View our Routing Strategies FIX Tags and Instructions document.

Additional Features

Web Products

BATS is committed to developing the best online data and tools to make doing business with BATS easy. For straightforward order look-up capabilities, port monitoring, price improvement data, trading statistics and market share information, BATS has created the Online Member Portal—a comprehensive suite of value-added tools designed specifically to give customers easy, online access to the information they need.

View our Web Products document for screenshots and descriptions of these free tools.

Rapid Rebate

The BATS Rapid Rebate Program allows active Members to receive their net liquidity rebates on a weekly basis.

Details on weekly net liquidity rebates are available on our Rapid Rebate document.

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