By Tope Alake Nigeria’s series of economic policy missteps in recent weeks highlighted some of the uncertainties investors face in buying into its high-yielding assets and Analysts Concern that Africa’s biggest economy is missing an opportunity created by rising oil prices to attract much-needed foreign currency. First, the country allowed fuel subsidies that have been a drain on state coffers in the past to creep back by allowing pump prices to stay low as the price of crude rose. Then the central bank devalued the naira, without providing any guidance on its currency-policy goals. And last week, the monetary authority u-turned on a decision to bar foreigners from investing in its short-term bills, leaving them wondering whether it’s worth the risk of putting money into an economy from which it’s notoriously difficult to extract it.