The dominant retailer reported another quarter of solid financial results. Once again, Costco (COST 0.83%) gave its shareholders reason to be optimistic. The massive warehouse store operator just reported revenue of $58.5 billion (up 9$3.78 (up 29%) that easily beat Wall Street consensus analyst estimates. The business continue to hum along. But even though this is a top retail stock that has crushed it for investors historically, I think it's best to keep ...