The governor of the Reserve Bank of India on Sunday called on major central banks to extend their network of currency swap lines deep into emerging markets, saying a type of “virtual apartheid” in the provision of foreign currencies hampers efforts to fight financial instability.
Urjit Patel’s unusually forthright language — central bankers rarely criticize each other in public — offers a glimpse of tensions among policy makers as an improvement in the global economy encourages some central banks to step back from the easy-money policies they have pursued for more than a decade.
So-called swap lines have emerged since

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