Asian stock markets closed lower across the board following the conclusion of the summit between US President Trump and Chinese President Xi Jinping, alongside market concerns over the Iran conflict. South Korea's KOSPI index broke the 8,000-point mark for the first time today, but subsequently fell due to profit-taking, closing down 6.1% at 7,493.18. Stock markets in Tokyo, Hong Kong, Taipei, and Jakarta also dropped by more than 1%.