New Delhi, Jan 30 (TIWN) Stock markets in Asia have tumbled to their lowest in nearly 15 months after Americ's central bank chief confirmed widely expected plans to increase interest rates this year, beginning in March, The Guardian reported.

With investors also concerned about political tensions between Russia and Ukraine, supply chain problems and rising oil prices, the prospect of sustained increases in the cost of borrowing by the world's most powerful economy sent a spasm of anxiety through financial markets on Thursday.