BANGKOK--Thailand's trade balance swung to a surplus of $1.79 billion in June from a deficit of $809 million in May, the Ministry of Commerce said Monday, as shipments bound for overseas picked up. Exports in June rose 3.9% year over year to $19.84 billion, said Department of Internal Trade Promotion Director General Nuntawan Sakuntanaga. The on-year rise in exports, the first time since February, was a result of improved demand in major markets and in almost every sector, Ms. Nuntawan said. Industrial-sector exports grew 3.9% and overseas shipment of...