MSCI's decision to defer including Chinese shares in its emerging market benchmark share indexes for a second time may have trapped the index provider into making promises it can't keep, both to Beijing and to its investor constituents.

While both MSCI and Chinese state media spun the decision as a speed bump on the way to inevitable inclusion, which will allow and in some cases require foreign funds to buy into Chinese stocks, the agendas of Chinese bureaucrats and foreign institutional investors are much further apart than they seem.