* Dollar index hits one-year high on Freddie, Fannie news
* Takeover seen bolstering U.S. economic recovery
* Yen, Swiss franc slide broadly on renewed risk appetite (Updates prices, adds comment, changes byline)
By Gertrude Chavez-Dreyfuss
NEW YORK, Sept 8 (Reuters) - The dollar climbed to a one-year peak versus a basket of currencies on Monday, as investors cheered the government's takeover of the two biggest mortgage finance agencies in a bid to restore confidence in the U.S. financial sector.
The bailout of the beleaguered Freddie Mac <FRE.N> and Fannie Mae <FNM.N>, which own or guarantee half of the United States' $12 trillion in outstanding home mortgage debt, also prompted investors to wade back into risky trades, by buying higher-yielding currencies and selling the yen.
Overall, analysts viewed the U.S. Treasury move as a positive step in staving off wider financial and housing market weakness.
"On balance, the takeover of Fannie and Freddie is a net positive for the U.S. dollar because it shores up confidence in the U.S. financial sector," said Omer Esiner, a senior market analyst, at Ruesch International on Washington.
"Having said that, I don't think the government action represents a silver bullet for all the problems facing the housing market and the economy. There are still so many questions about this bail-out."
In midday trading, the U.S. dollar index on the ICE Futures Exchange, which measures the value of the dollar against a basket of six currencies, surged to a one-year high of 79.416<.DXY>, according to Reuters data. It was last up 0.9 percent at 79.206.
The euro fell to $1.4164 <EUR=>, the lowest in nearly 11 months. It last traded at $1.4198, down half a percent from late on Friday.
The dollar initially fell in the aftermath of the weekend action as investors took the government's takeover of the stricken government-sponsored enterprises (GSEs) as an excuse to buy riskier assets, sending stock markets soaring and the low-yielding Japanese yen sharply lower.
The dollar last traded up 0.3 percent at 108.46 yen <JPY=>. The euro was slightly down versus the yen at 153.67 <EURJPY=>.
BUDGET IMPLICATIONS OF BAIL-OUT
But while the news did much to alleviate concern about systemic financial market risks, it did little to change fundamentals that had started to drive the dollar higher prior to the weekend -- slowing growth in the euro zone and the UK.
And this should mean continued dollar gains in the weeks ahead.
Some analysts though have expressed reservations about the latest U.S. government move and were not ruling out a correction in the dollar's bullish trend of the past month.
Analysts at Wells Fargo said the potential costs to the taxpayer could be substantial and unwelcome in an economic slowdown where the U.S. Treasury has limited scope for fiscal maneuver.
"We do believe...that the dollar's surge has gotten ahead of itself and, as significant as today's announcement is, it is not clear it will provide all the answers to the mortgage market's difficulties," Wells Fargo said in a research note.
"As initial euphoria gives way to measured sentiment, we still see potential for a sizable dollar correction in coming weeks, with the euro gaining towards the high $1.40s."
In the wake of the Fannie and Freddie takeover, U.S. Treasuries sank and U.S. and European shares rallied.
Sterling reversed earlier gains versus the dollar after UK manufacturing output prices suggested factory gate inflation might have peaked. The pound <GBP=> was last down 0.2 percent at $1.7617. The euro <EURGBP=> was down 0.2 percent at at 81.90 pence.
The improvement in investors' appetite for risk pushed the New Zealand dollar <NZD=> up 0.6 percent at US$0.6729, while its Australian counterpart <AUD=> rose 0.4 percent to US$0.8191. The two currencies also posted big gains versus the yen.
The dollar also gained 0.7 percent against the low-yielding Swiss franc to 1.1263 francs <CHF=>.
(Additional reporting Lucia Mutikani; Editing by Richard Satran)