Thailand’s exports bounced 13% in May, the fastest rate since January 2013 and well above economists’ expectations of 6%. Yet, exports lagged imports which expanded 18%. That’s a pattern seen across Asia including India, China and South Korea. Export growth may not prove sustainable. In part it is driven by volatile agricultural goods including rubber, which jumped 60%. Future problems may also lay with electronics and electricals which rose 24% and 14%. Regulatory reviews in the U.S., where export growth has been led by home appliances, may lead to higher tariffs or broader restrictions...