... Selecting the right broker can make a big difference in your use of the markets...and potential rewards. A. Packard Trading (APT) is a DBA of The Zaner Group, an Independent Introducing Broker located in the heart of Chicagos financial district . APT was designed to handle the needs of all traders-- from full service to discount to online-- with attention to detail and customer service rarely found in the brokerage industry. We offer very competitive commission r...