The Swiss franc gained against the euro as the downgrade of Portugal’s credit rating by Moody’s Investors Service spurred demand for the currency as a safe haven.

The Canadian dollar weakened today as China boosted the lending rates to stem its economic growth, reducing appeal of growth-related currencies.

The New Zealand dollar advanced today as the rally of stocks and commodities increased attractiveness of the currency to investors that look for higher-yielding assets.

The Russian ruble fell today, after five sessions of gains against the US dollar, as crude oil, the main source of the nation’s export revenue, trimmed gains in New York.

The Australian dollar fell against its US counterpart, rose versus the euro and was little changed against the Japanese yen after the nation’s central bank kept its interest rates unchanged and the trade balance surplus increased.

The euro slumped today, falling against the US dollar for the first time after six sessions of gains, as Moody’s downgraded Portugal’s rating to junk today.

The South African Rand fell today as the speculation that Standard & Poor’s may issue a default rating for Greece reduced attractiveness of riskier currencies.

The report about the UK Services PMI showed an unexpected growth, bolstering the Great Britain pound, but it can’t be considered completely positive as the data showed an underlying weakness of Britain’s economy.

This week was the best for the euro in 2011 as Greece accepted austerity required to get the bailout, spurring the shared 17-nation currency and allowing it to erase losses that the currency experienced during June.

The Canadian dollar jumped today, ending this week without losses against its US counterpart, as risk appetite, caused by the improvement of the Greek situation, spurred demand for higher-yielding currencies.