* Dollar, yen gain on risk aversion
* SEC charges Goldman Sachs with fraud
* Euro still weighed down by Greece
* Sterling hit by political uncertainty; Aussie falls (Adds quotes, byline, updates prices)
By Gertrude Chavez-Dreyfuss
NEW YORK, April 16 (Reuters) - The dollar and yen posted sharp gains on Friday after the Securities and Exchange Commission charged a leading U.S. investment bank with fraud, prompting investors to seek refuge in both currencies.
Goldman Sachs Group Inc
The news also added pressure on stocks and other currencies that tend to benefit from increased risk appetite such as the euro, sterling, and Canadian dollar.
"The Goldman news really changed the tide for financial markets," said Steven Butler, director of currency trading at Scotia Capital in Toronto.
"The market was already feeling risk averse even before Goldman. That news just accelerated the unwinding of risky trades and so we're seeing safe-haven bids in the dollar and yen."
The dollar and yen typically get a bid in times of heightened risk aversion. Both were already higher against the euro, with investors still concerned about how a European Union-International Monetary Fund aid plan for Greece will work in practice.
As a result, the premium demanded to buy Greek government bonds rather than German bonds rose further. [GVD/EUR]
In early afternoon trading, the euro was down 0.7 percent
against the dollar at $1.3485
The $1.3500 level was seen as key because it marks the peak reached last Friday before the euro zone single currency gapped higher after the weekend in response to the agreement on terms of the Greek bailout deal.
The U.S. dollar also surged against the Canadian dollar,
rising 1.4 percent at C$1.0153
The euro fell 1.8 percent to 124.11 yen
The yen was already stronger on the day ahead of the Goldman news, largely shrugging off comments from a lawmaker from Japan's ruling party who said monetary easing and intervention to weaken the yen were needed to beat deflation. [ID:nTKF106921]
The Japanese currency, sometimes used as a proxy for other less-liquid Asian currencies, may have been boosted after Chinese President Hu Jintao said China has always acted on the principle of gradually putting in place a managed floating exchange rate system. [ID:nN16136302]
Hu Jintao made the comments in a speech, a transcript of which was released on Friday.
"The news doesn't change our view that China will be looking at flexibility in its currency regime and moving to a crawling peg," said Mike Moran, senior currency strategist at Standard Chartered in New York. "But the volatility that we have seen suggests that the market is extremely sensitive to any news on China."
Sterling, meanwhile, fell on concerns a May 6 UK election may result in no single party winning a majority, as polls showed the heads of the two main parties were beaten in a TV debate by the leader of the third, the Liberal Democrats. [ID:nLAC005697]
The British pound fell 0.8 percent against the dollar
(Additional reporting by Nick Olivari) (Editing by Theodore d'Afflisio)