(Adds European futures, updates levels throughout)
* Asian shares, ex-Japan, up after 4 sessions of losses
* Japan's Nikkei falls as some stocks trade ex-dividend
* U.S. dollar on uphill trend, euro at more than 1-mth lows
* Fed's Yellen says gradual hikes should continue
* Gold, copper a tad firm; crude pops higher
By Swati Pandey
SYDNEY, Sept 27 (Reuters) - Shares rose on Wednesday as investors hoped for progress on major tax reform in the United States, while the dollar hovered near one-month highs on growing expectations of a U.S. interest rate increase in December.
European stock futures and Dax futures climbed 0.3 percent each while FTSE futures gained 0.2 percent.
MSCI's broadest index of Asia-Pacific shares outside Japan added 0.1 percent, after falling for four straight days to a three-week trough.
The Trump administration and Republicans in Congress are due to outline a tax plan on Wednesday. If passed, it would be the first significant legislative victory for U.S. President Donald Trump since taking office in January.
It would also be a win for Wall Street as corporate tax cuts would potentially boost company profits, while a tax amnesty on offshore cash holdings could fuel share values as well as demand for the dollar.
"We're now seeing some embryonic prospects of a tax reform in the United States which is a much bigger issue for the markets than the Federal Reserve," said Ray Attrill, Sydney-based global head of forex strategy at National Australia Bank.
"Our view has been the market had moved from applying a Trump premium from November-December to applying Trump discount due to his inability to pass any major reforms. A meaningful tax reform could serve to reduce some of that discount."
Analysts said the U.S. tech space will be one to watch as it has mountains of cash that could be repatriated for share buybacks and dividends.
Wall Street ended mostly flat on Tuesday, but the tech sector gained 0.4 percent, with Apple shares rising 1.7 percent after four sessions of declines.
China's CSI 300 index rose 0.3 percent on Wednesday, while Japan's Nikkei was off 0.3 percent, with some stocks trading ex-dividend.
In currencies, the dollar index last stood at 93.17 from 93.286 touched on Tuesday, the highest since Aug. 31.
Markets were put on notice by Federal Reserve Chair Janet Yellen who used a Tuesday speech to warn it would be "imprudent" to keep policy on hold until inflation is back to 2 percent. She said the U.S. central bank "should also be wary of moving too gradually" on rates.
Atlanta Fed chair Raphael Bostin also talked up the prospect of a December rate hike.
The dollar also climbed on the yen to loiter near a 2-1/2 month high at 112.48, helped by rising U.S. Treasury yields.
The yield on 2-year Treasury notes, which rises with traders' expectations of higher Fed fund rates, touched 1.4590 percent, a level not seen since October 2008.
The euro was near more than one-month lows at $1.1777 as investors faced weeks of political horse-trading in Germany before a new government could be formed.
Spot gold was a touch firmer, but still near one-month lows at $1,294.58, while copper hopped 0.8 percent from a six-week trough.
Crude oil prices popped up on Wednesday on supply fears after the weekly API inventory report showed a 761,000 barrel build-up in crude inventories compared to consensus estimate of a 2.52 million barrel in an official report due later in the day, analysts said.
U.S. crude climbed 35 cents to $52.23 per barrel, while Brent added 34 cents to $58.78.
Reporting by Swati Pandey; Editing by Wayne Cole, Shri Navaratnam and Kim Coghill