Market observers criticize the practice of retail brokers routing retail orders to wholesalers and argue that retail flow should execute on exchanges. Using comprehensive data, we show that both wholesalers and exchanges have characteristics beneficial for retail orders. Wholesalers provide...

This paper studies the market quality of an internalization system which is designed as part of an open limit order book (the Xetra system operated by Deutsche Börse AG). The internalization sys-tem (Xetra BEST) guarantees a price improvement over the inside spread in the Xetra order book. We...