Kudos to Kiplingers, who in "Best Online-Broker Deals for Fund Investors" is the brokerage ranking to consider "where the brokers put your uninvested cash." The article says, "The better brokers -- Siebert among them -- automatically sweep your cash into a decent-yielding money-market fund. Fidelity gets a middling score because it requires investors to opt for a money-market fund; otherwise, cash goes into an interest-bearing account. We gave the least credit to firms that don't offer a money-market fund at all (Scottrade) or that impose restrictions."