Dollar rises on risk aversion; euro revisits parity

EW YORK, Aug 22 (Reuters) - The U.S. dollar rose across the board on Monday, driving the euro back below parity, as investors shied away from riskier assets amid growing fears that interest-rate hikes in the United States and Europe, aimed at curbing inflation, would weaken the global economy.

Against a basket of currencies, the dollar rose 0.8% to a more than five-week high of 109.02 , not far from the two-decade peak of 109.29 touched in mid-July.

The greenback has found support in recent sessions as several Federal Reserve officials reiterated an aggressive monetary tightening stance ahead of the Fed's Jackson Hole, Wyoming, symposium this week.

The latest of these officials, Richmond Fed President Thomas Barkin, on Friday said the "urge" among central bankers was toward faster, front-loaded rate increases. 

"It's risk being taken off the table after the market got a reality check from last week's Fed speakers that an imminent dovish pivot is off the cards," said Michael Brown, head of market intelligence at Caxton in London.

With investors now clearly expecting a relatively hawkish message from Fed Chair (Jerome) Powell at Jackson Hole on Friday, it's a perfect cocktail of risk-aversion and a hawkish Fed for the greenback to bound higher, especially when growth worries, especially in Europe, continue to mount," Brown said.

The euro fell following Russia's announcement late on Friday of a three-day halt to European gas supplies via the Nord Stream 1 pipeline at the end of this month. Investors worry that the halt could exacerbate an energy crisis that has weighed on the common currency in recent months.