Real effective exchange rate 81, 100 below standard
Brazil rated highest followed by Russia, Indonesia, China

The Korean Won has been rated second lowest amongst the G20 nations
According to a statement made by the Bank of Korea on the 9th, after analysis of the BIS REEP of the G20 membership nations in September the Won is rated at 81.67, which is below the standard 100 point. The real effective exchange rate (REEP) of the BIS was established in 2005, and is the balanced, long term exchange rate with the market prices of a nation taken into account. If the score is above 100 the currency is rated highly while a lower score means low ratings. The Won has a 18.33% chance of being underrated.
The lowest currency according to the REEP amongst the G20 nations was the British Pound (81.23), the Argentinean Peso (83.29) which rated third after Korean Won, the Mexican Peso (89.25) and the American Dollar (89.41).
In the opposite end, the Brazilian Real was rated highest at 148.16, followed by the Russian Ruble (125.79), Indonesian Rupee (124.58) and Chinese Yuan (119.65).
China is using the BIS REEP as the evidence to nullify the pressure to revalue the Yuan. However America is refuting this statement with a statement from the Peterson Institute of International Economy saying that after analysis of the scores, a revalue of the Yuan is still plausible.
G20 nations which officially intervened in the exchange market or imposed regulations on capital import/export has experienced a fall in their exchange rate due to a large fluctuation of their own currency. Korea and Indonesia, who seem to start regulations on capital import/export, had a large currency drop rate in reference to the annual high point at 29.2% and 29.9%.
Meanwhile at Basel, Switzerland Chairman Kim Jung Su of the Bank of Korea stated at the BIS summit that there must be an effort to lower exchange rate fluctuations through a global financial safety net. Chairman Kim continued that "I am hoping that at the Seoul G20 conference, there is a step forward from the minister of finance/central bank conference held at Kyung-Ju. It is very important to swiftly and sufficiently acquire information relevant to policy decisions according to changing environments in order to stabilize the financial situation."