Stock Market Reverses Lower On Higher Volume, But Costco Breaks Out By: Investor's Business Daily August 27, 2019 at 17:46 PM EDT The major stock indexes were broadly lower Tuesday on heavier volume. Meanwhile, top retail stock Costco broke out above a buy point. Read More >> Related Stocks: Chipotle Mexican Grill Costco Wholesale Kirkland Lake Gold Ltd Pinterest Inc Twitter, Inc.