The business models, based on flying $5 dresses from Chinese factories to shoppers around the world, were already under pressure after U.S. President Donald Trump introduced tariffs and axed customs waivers on low-value parcels last year. Soaring logistics costs stemming from the Middle East conflict are adding to the strain, data shows and industry insiders say, with shippers like DHL Express imposing hefty fuel surcharges.

The business models, based on flying $5 dresses from Chinese factories to shoppers around the world, were already under pressure after U.S. President Donald Trump introduced…

China's e-commerce export boom is losing momentum as the Iran war drives up jet fuel costs and dampens demand from lower-income consumers in the West,...