['LOC | Chinese', 'LOC | SHANGHAI', 'LOC | Shanghai', 'ORG | MSCI_Inc.', 'PERCENT | -0.08%', 'PERCENT | -0.15%', 'exchangeName | SHCOMP', 'exchangeName | Shenzhen_399106']
SHANGHAI — Index provider MSCI Inc. said it would quadruple the contribution of mainland Chinese companies’ to its benchmarks, a move that makes shares in Shanghai SHCOMP, -0.08%   and Shenzhen 399106, -0.15%   all but unignorable for many international investors.