(Adds details, table, comment, byline) By Gertrude Chavez-Dreyfuss April 28 (Reuters) - Net long positions on the U.S. dollar were near flat from a week earlier, according to calculations by Reuters and Commodity Futures Trading Commission data released on Friday.
The value of the dollar's net long position totaled $15.29 billion in the week ended April 25, down slightly from $15.34 billion the previous week.
The dollar failed to gain traction over the last few days, as U.S. President Donald Trump's tax reform plan underwhelmed investors and raised doubts about how it could get done. Over the last two weeks, the dollar index has dropped 1.5 percent and has underperformed for most of the year to date.
The greenback is expected to be in focus next week ahead of a slew of events and economic data, including the Federal Reserve Open Monetary Policy meeting and Friday's U.S. nonfarm payrolls report.
As investors head into a busy week, analysts say the dollar remains vulnerable.
"Despite Friday's rally, U.S. data has been terrible," said Kathy Lien, managing director of FX strategy at BK Asset Management in New York.
"There's currently a major misalignment between the performance of the U.S. economy and the market's expectations for Fed tightening." Net shorts on the Canadian dollar this week ballooned to 42,642 contracts, the largest since early February 2016 as the United States works to renegotiate the terms of its NAFTA deal with Canada and Mexico.
Meanwhile, long positioning on the Mexican peso swelled to 16,038 contracts, the largest since mid-September 2014.
Net short euro contracts, on the other hand, fell to 20,895 this week. Last week, euro net shorts rose to their highest since mid-March.
Euro short positioning has eased after independent centrist Emmanuel Macron came out ahead of Marine Le Pen, head of the anti-European Union and anti-immigrant National Front, in the first round of the French election last weekend.
"Without the post-election breakout last Sunday, the euro would not have been this week's best performing currency and politics should continue to provide the single currency with support going into the final round of the French election," said BK's Lien.
Japanese Yen (Contracts of 12,500,000 yen) $3.024 billion April 25, 2017 Prior week week Long 48,538 45,761 Short 75,407 76,224 Net -26,869 -30,463 EURO (Contracts of 125,000 euros) $2.853 billion April 25, 2017 Prior week week Long 157,831 185,786 Short 178,726 207,435 Net -20,895 -21,649 POUND STERLING (Contracts of 62,500 pounds sterling) $7.317 billion April 25, 2017 Prior week week Long 54,050 48,348 Short 145,232 147,838 Net -91,182 -99,490 SWISS FRANC (Contracts of 125,000 Swiss francs) $2.179 billion April 25, 2017 Prior week week Long 7,654 10,830 Short 24,971 24,632 Net -17,317 -13,802 CANADIAN DOLLAR (Contracts of 100,000 Canadian dollars) $3.143 billion April 25, 2017 Prior week week Long 52,545 37,306 Short 95,187 70,558 Net -42,642 -33,252 AUSTRALIAN DOLLAR (Contracts of 100,000 Aussie dollars) $-3.218 billion April 25, 2017 Prior week week Long 64,684 70,392 Short 21,982 27,130 Net 42,702 43,262 MEXICAN PESO (Contracts of 500,000 pesos) $-0.425 billion April 25, 2017 Prior week week Long 91,689 97,027 Short 75,651 82,783 Net 16,038 14,244 NEW ZEALAND DOLLAR (Contracts of 100,000 New Zealand dollars) $1.07 billion April 25, 2017 Prior week week Long 18,693 18,320 Short 34,097 33,326 Net -15,404 -15,006 (Reporting by Gertrude Chavez-Dreyfuss; editing by Diane Craft and Jonathan Oatis)