Turkey's central bank held its key interest rate at 37% as expected on Wednesday, deciding not to hike but warning that fallout from the Iran war could yet change the inflation outlook. It was the second straight policy meeting at which the bank held steady despite some expectations that it could tighten, suggesting it was preparing to stand pat well into the summer, analysts said. The central bank also did not adjust its overnight lending and borrowing rates from 40% and 35.5% respectively.