DUBAI (Reuters) -Saudi Arabia's stocks posted their biggest daily rise since 2020 on Wednesday, following a report that the markets regulator may ease rules capping foreign ownership of listed companies. The Saudi benchmark index surged more than 5% to its highest since May, after Bloomberg News reported that regulators may soon ease the 49% cap on foreign ownership of listed firms, a move that could help revive interest in the Arab world's biggest stock exchange. "It could come into effect before the ...