ULAN BATOR, Feb. 20 (Xinhua) -- The exchange rate of Mongolian national currency the Tugrik against U.S dollars has strengthened since Feb. 14, the Bank of Mongolia, Mongolia's central bank, said Tuesday.

One dollar buys 2397.63 Mongolian Tugrik on Tuesday, down from 2423.37 Mongolian Tugrik a month ago.

Meanwhile, the Mongolian Tugrik has also gained ground against the Chinese Yuan. One yuan buys 377.69 Mongolian Tugrik on Tuesday, down from 382.62 Mongolian Tugrik a month ago.

Economists said a steady increase in foreign aid, loans and investment in the country have contributed to the strong Mongolian Tugrik.