NEW YORK (AP) — U.S. stocks have given up an early gain this morning as investors continue to wonder if big changes in international trade are on their way. Retailers in the U.S. are edging higher, but big technology companies are down again. Stock indexes in Europe and Asia have come back from a holiday weekend with losses.

DETROIT (AP) — General Motors says it will stop reporting its sales figures every month and instead will post the numbers each quarter. The move could prompt other automakers to make the same change. Currently nearly all U.S. automakers report sales monthly. GM says 30 days isn't long enough to separate real trends from short-term fluctuations caused by weather, new product launches or other factors.

DETROIT (AP) — Electric car maker Tesla says it increased production of its Model 3 mass-market car in the first quarter but still fell far short of the numbers it promised last summer. The California company says it made just under 9,800 Model 3s from January through March. That's four times what it made in the fourth quarter. But it's still only a fraction of the 20,000 per month that CEO Elon Musk promised when Tesla first started making the car.

NEW YORK (AP) — Facebook is asking users whether they think it's "good for the world" in a poll sent to an unspecified number of people. The latest poll appears under the heading, "We'd like to do better," when users log in. Possible responses range from "strongly agree" to "strongly disagree." Facebook regularly polls users on its service. The latest comes as the company grapples with a privacy scandal and other troubles .

DALLAS (AP) — Federal authorities in Dallas have arrested one of the designers of a Kansas water park slide that decapitated a 10-year-old boy. The chief deputy with the U.S. Marshals Service in Dallas says John Schooley was met by agents at Dallas-Fort Worth International Airport late Monday. Schooley will be held in Dallas pending his arraignment and extradition to Kansas on charges that include second-degree murder.