DALLAS — FedEx posted weak quarterly results in its core express business and warned Tuesday that its profit in the year ahead will be hurt by slowing growth in the world economy and the decision to drop a contract with retail giant Amazon.

The delivery company reported a quarterly loss of nearly $2 billion. After adjusting for a change in pension-plan accounting and other items that the company doesn’t expect will repeat, however, the results were better than Wall Street expected.

FedEx started a new fiscal year this month, and Chief Financial Officer Alan Graf said the company’s performance, especially at FedEx Express, is being hurt by continued weakness in global trade and industrial production.

The company announced this month that it would not renew an airfreight-delivery contract with Amazon that expires Sunday. It did not disclose the value of that work, but said Amazon accounted for less than 1.3 percent of its revenue in 2018.

FedEx also finds itself in the middle of a trade dispute between the U.S. and China. On Monday, the company sued the Commerce Department, seeking to stop it from enforcing export rules that restrict shipments to Chinese telecommunications-equipment maker Huawei Technologies. Huawei was recently added to a list of companies barred from receiving U.S. technology without a special license from the Commerce Department.

In the fiscal fourth quarter, which ended May 31, FedEx reported a loss of $1.97 billion, compared with profit of $1.13 billion a year earlier.

The company’s biggest business, express, saw lower revenue from international priority packages, and the unit’s operating income slid by 12 percent on a 1 percent dip in sales.