(Bloomberg) -- Some of Asia’s biggest central banks are getting a painful refresher in economic theory. Monetary authorities in China, India and elsewhere have waged a prolonged campaign against the strong dollar, using a mix of official reserves and opaque derivatives trades to defend their currencies. But their moves have pushed up borrowing costs for local banks just when slowing economies need more liquidity. China’s overnight and seven-day repo rates surged in February, while bond investors took losses from a sharp rise in yields. Banking liquidity in India suffered its...