The dollar peg as the anchor of monetary policy

Bahrain's inflation and exchange-rate charts stay remarkably flat for over four decades for a simple reason: the Central Bank of Bahrain has pegged the dinar at 0.376 to the US dollar essentially unchanged since 1980. The CBB describes this arrangement as deliberate rather than incidental, a monetary framework that mirrors Bahrain's major trading and investment partners and is common among small, open economies when backed by supportive fiscal and structural policy. Because the exchange rate itself is fixed, the CBB's own account of its policy explains that the peg serves as the anchor for domestic monetary policy, doing much of the work that an inflation target or interest-rate rule would do elsewhere, by controlling imported inflation and protecting the currency's external value. The tradeoff is that Bahrain's central bank has little independent control over interest rates, which largely track the US Federal Reserve, and that episodes of low oil prices or regional financial stress show up not in the exchange-rate chart, which barely moves, but in reserves, bank liquidity, and periodic reliance on support from Gulf neighbors rather than currency depreciation.