Walmart became the latest major store to exceed earnings estimates Wednesday, and shares of the company climbed in pre-market trading. The Walmart news might help give the rest of the market a lift, but Brexit worries have the dollar on the rise again. Walmart earnings of $1.08 per share beat third-party consensus of $1.01, while revenue of $124.9 billion came in just shy of estimates. Walmart also raised fiscal 2019 guidance, and said ecommerce sales—a closely-watched area—rose 43%. That was well above estimates of 35% to 40%, and came as U.S. same-store sales……………