* Dollar index registers biggest weekly gain in 11 months
* U.S. Q3 GDP rises 3 pct, exceeds analyst forecasts
* Catalan parliament vote to secede boosts yen, Swiss franc
(Updates market action) NEW YORK, Oct 27 (Reuters) - The euro fell on Friday, marking its biggest weekly loss of the year a day after the European Central Bank decided to prolong its bond purchases and signaled its willingness to stick with an ultra-loose policy stance. The tension between Madrid and Catalonia's secessionists also stoked selling in the single currency after the Catalan parliament on Friday declared independence from Madrid following a secret ballot. Spain Prime Minister Mariano Rajoy retaliated
"The dovish surprise from the ECB was its openness to extend the duration of its bond purchase program," said Omer Esiner, chief market strategist at Commonwealth Foreign Exchange in Washington. On Thursday, the ECB said it will extend its bond purchases into September 2018 while reducing its monthly purchases by half to 30 billion euros starting in January. The move raised bets the ECB was unlikely to raise interest rates until 2019 as the U.S. Federal Reserve has remained on its path to hike U.S. rates further. The Fed will hold a two-day policy meeting next Tuesday and Wednesday where policy-makers are expected to leave rates unchanged. The euro was down 0.5 percent at $1.1595, bringing its weekly loss against the dollar to 1.6 percent for the biggest in 11 months. Against the yen, the common currency was 0.6 percent lower at 131.98 yen after touching its weakest level in nearly two weeks. The Catalan parliament vote revived some safe-haven demand for the yen and Swiss franc. Even in the aftermath of Friday's political turmoil, "the situation in Spain seemed largely contained for now," Eisner said. As the euro wobbled this week, the dollar strengthened on upbeat economic data, hopes for a tax cut and speculation about President Donald Trump's selection of someone who favors a faster pace of rate increases than current Fed Chair Janet Yellen, whose term expires in February. The U.S. government reported on Friday that the economy grew at a 3.0 percent annual rate in the third quarter, faster than the 2.5 percent forecast among economists polled by Reuters.
Earlier Friday, Bloomberg reported that Trump leans toward nominating Fed Governor Jerome Powell as the next Fed chief, but has not made up his mind. The dollar pared gains briefly on that report as Powell is seen less hawkish than Stanford University economist John Taylor, another potential nominee to lead the central bank. Trump, who is expected to announce his Fed chief candidate nex week, is also considering Yellen, former Fed Governor Kevin Warsh and his economic adviser, Gary Cohn, for the Fed's top job. The index that tracks the dollar against six currencies was up 0.3 percent at 94.919 after hitting a three-month high at 95.150. It gained 1.3 percent for its biggest weekly increase so far this year.
Currency bid prices at 1500 EDT (1900 GMT):
Description RIC Last U.S. Close Pct YTD Pct High Bid
Previous Change Change
Euro/Dollar EUR= $1.1597 $1.1650 -0.45 +10.31 +1.1657 +1.1575 Dollar/Yen JPY= 113.7800 113.9700 -0.17 -2.64 +114.4400 +113.7200 Euro/Yen EURJPY= 131.96 132.77 -0.61 +7.16 +132.9400 +131.7500 Dollar/Swiss CHF= 0.9984 0.9975 +0.09 -1.91 +1.0037 +0.9974 Sterling/Dollar GBP= 1.3122 1.3158 -0.27 +6.37 +1.3162 +1.3072 Dollar/Canadian CAD= 1.2850 1.2845 +0.04 -4.32 +1.2916 +1.2846 Australian/Doll AUD= 0.7666 0.7660 +0.08 +6.25 +0.7672 +0.7626
Euro/Swiss EURCHF= 1.1580 1.1622 -0.36 +8.05 +1.1648 +1.1561 Euro/Sterling EURGBP= 0.8836 0.8851 -0.17 +3.73 +0.8901 +0.8825 NZ NZD= 0.6871 0.6842 +0.42 -1.01 +0.6875 +0.6819
Dollar/Norway NOK= 8.1553 8.1684 -0.16 -5.58 +8.2284 +8.1539 Euro/Norway EURNOK= 9.4576 9.5181 -0.64 +4.09 +9.5420 +9.4577 Dollar/Sweden SEK= 8.3610 8.3476 -0.26 -8.20 +8.3998 +8.3434 Euro/Sweden EURSEK= 9.6984 9.7234 -0.26 +1.24 +9.7505 +9.6917
(Additional reporting by Saikat Chatterjee in London; Editing