French electrical distributor Rexel has a network of outlets that sell sockets, plugs, and a host of other products to tradespeople across the world. Known as the Amazon. com of the bricks-and-mortar electrical-equipment world, Rexel (ticker: RXL.France) has built a loyal band of customers by driving down prices from suppliers, and imparting expert advice. The firm has had a tough 2020, along with rivals, who have suffered store closures due to Covid-19 and a slowdown in business. The shares increased 7.8% over the past 12 months—but they have climbed 13.7%, to 13.09...