* Pound tumbles as no-deal Brexit talk grows louder * Euro falls ahead of Thursday's ECB meeting * Risk aversion hits FX markets, dollar shines * Graphic: World FX rates in 2020 tmsnrt.rs/2RBWI5E (Recasts, adds new comment, FX table, updates prices, changes byline, dateline; previous LONDON) By Gertrude Chavez-Dreyfuss NEW YORK, Sept 8 (Reuters) - The U.S. dollar climbed to a three-week peak on Tuesday, helped by losses in sterling on renewed worries about Brexit as well as investors' aversion to risk amid a sell-off on Wall Street. Sterling fell to a four-week low against the dollar and was last down 0.9% at $1.3045. Britain had gone into Tuesday's fresh round of Brexit trade talks warning it was ramping up no-deal preparations. A sense of crisis took hold as the Financial Times reported the head of Britain's legal department had quit over suggestions Boris Johnson wanted to override parts of the existing divorce deal. Aside from Brexit concerns, currency investors flocked to the safe-haven dollar as U.S. stocks got hammered "We're seeing a sterling-driven market that has seen the dollar rally. Markets are re-pricing a no-Brexit deal," said Erik Bregar, head of FX strategy, at Exchange Bank of Canada in Toronto. "There is also some risk-off moves in the stock market, which is a mild positive for the dollar," he added. In mid-morning trading, the dollar index rose 0.3% to 93.294, after earlier advancing to a three-week high of 93.483. The greenback, however, struggled against the safe-haven yen, falling 0.3% to 105.97, weighed down by weakness in U.S. stocks. The yen rose despite data showing Japan's economy shrank an annualised 28.1% in April-June, worse than the initial estimate of a 27.8% contraction, revised data from the Cabinet Office showed on Tuesday. The euro, meanwhile, fell to a two-week low versus the dollar, and was last down 0.3% at $1.1785 ahead of the European Central Bank's post-summer meeting later in the week. Most analysts don't expect a change in the central bank's policy but are looking to the message on its inflation forecasts and whether it seems concerned by the euro's strength following its recent rise to $1.20. Euro zone data also showed its economy shrivelled by slightly less than initially estimated in the second quarter, but the drop was still the sharpest ever as consumer spending caved in due to COVID-19 restrictions. The yuan dipped against the dollar too in the offshore market, after U.S. President Donald Trump warned about "decoupling" the U.S. and Chinese economies. The dollar was last up 0.2% at 6.848 yuan. The Australian dollar reversed course to drop 0.5% to US$0.7239 and the New Zealand dollar slid 0.8% to US$0.6636 following a Sunday statement from the central bank, which again raised the prospect of negative rates. In emerging markets, Turkey's lira hit another record low and Russia's rouble sagged to it lowest since April amid ongoing talk about fresh Western sanctions. ======================================================== Currency bid prices at 10:34AM (1434 GMT) Description RIC Last U.S. Close Pct Change YTD Pct High Bid Low Bid Previous Change Session Euro/Dollar EUR= $1.1784 $1.1817 -0.28% +5.12% +1.1827 +1.1766 Dollar/Yen JPY= 105.9300 106.2500 -0.30% -2.69% +106.3800 +105.9100 Euro/Yen EURJPY= 124.84 125.53 -0.55% +2.37% +125.6400 +124.7100 Dollar/Swiss CHF= 0.9176 0.9159 +0.19% -5.19% +0.9199 +0.9160 Sterling/Dollar GBP= 1.3033 1.3166 -1.01% -1.70% +1.3171 +1.3010 Dollar/Canadian CAD= 1.3175 1.3096 +0.60% +1.46% +1.3198 +1.3086 Australian/Doll AUD= 0.7236 0.7274 -0.52% +3.06% +0.7309 +0.7217 ar Euro/Swiss EURCHF= 1.0815 1.0822 -0.06% -0.34% +1.0846 +1.0811 Euro/Sterling EURGBP= 0.9040 0.8974 +0.74% +6.93% +0.9053 +0.8970 NZ NZD= 0.6634 0.6690 -0.84% -1.51% +0.6706 +0.6631 Dollar/Dollar Dollar/Norway NOK= 9.0655 8.9329 +1.48% +3.27% +9.0936 +8.9224 Euro/Norway EURNOK= 10.6837 10.5603 +1.17% +8.60% +10.7020 +10.5510 Dollar/Sweden SEK= 8.8057 8.7691 +0.11% -5.80% +8.8320 +8.7655 Euro/Sweden EURSEK= 10.3777 10.3665 +0.11% -0.87% +10.4005 +10.3566 (Reporting by Gertrude Chavez-Dreyfuss; Additional reporting by Marc Jones in London Editing by Nick Zieminski)
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