Online brokerage site Zecco somehow failed to predict that surprising customers with multi-million dollar trading balances for April Fools would encourage their customers to make actual trades with their newfound riches. When Zecco realized what was happening, they responded by panic-selling the purchased stocks at a loss and charging the balance to customers, along with a $19.99 broker-assisted trading fee. One poor schmo bought $1 million worth of shares that were later sold for less than the purchase price.