Key TakeawaysWayfair reported that it added customers and reduced expenses, helping it post better-than-expected fourth-quarter results.The online furnishing retailer's adjusted net loss was narrower than forecast, while its revenue for the latest quarter beat estimates.CEO Niraj Shah said Wayfair benefited from job cuts and other steps to improve efficiencies.Wayfair Inc. (W) shares jumped Thursday after the online home furnishing retailer posted a lower-than-expected net loss as it cut costs and added cus ...