* Oil dips on prospect Iran nuclear deal to boost supply
* World share markets gain on hope Iran deal to boost growth
* Yen drops to six-month low vs dollar as Nikkei surges
By Herbert Lash
NEW YORK, Nov 25 (Reuters) - The deal to curb Iran's nuclear program prompted oil prices to fall and world equity markets to rise on Monday as investors priced in an easing of Mideast political tensions and the lift it could give to global economic growth.
The breakthrough accord reached over the weekend in Geneva halts Iran's most sensitive nuclear activities and gives it some relief from crippling sanctions, but does not allow the OPEC member to boost oil sales for six months.
The interim pact - aimed at easing a decades-old stand-off between Iran and the United States - won the critical endorsement of Iranian cleric Supreme Leader Ayatollah Ali Khamenei. France, Britain, China, Russia and Germany also agreed to the accord.
Despite tough work ahead to transform the agreement into a permanent solution, it was enough to ease oil supply fears and send Brent crude down $1.04 to $110.01. Crude prices pared losses after hitting a session low of $108.05 on the realization markets will not soon be awash in new supply.
"The deal is a step in the right direction, but it's still very early days," said Amrita Sen, chief analyst at consultants Energy Aspects in London.
"That's why, after the knee-jerk reaction, the market is stabilizing. It's realizing, at least in the next few months, there's not going to be a substantial increase in oil exports."
Equity markets in Europe also pared some gains and Wall Street edged higher, after straddling the break-even mark.
The nuclear deal with Iran gave European airline stocks and French carmakers a boost and sent Germany's DAX to a record high.
Global equity markets, as measured by MSCI's all-country world index of 45 countries, rose 0.14 percent, while the pan-European FTSEurofirst 300 of leading regional shares closed up 0.43 percent at a provisional 1,302.53.
The Dow Jones industrial average rose 29.99 points, or 0.19 percent, at 16,094.76. The Standard & Poor's 500 Index was up 1.03 points, or 0.06 percent, at 1,805.79. The Nasdaq Composite Index was up 5.23 points, or 0.13 percent, at 3,996.88.
The Nasdaq breached the 4,000 mark for the first time since September 2000, when the index was coming off all-time highs after the tech bubble burst earlier that year.
Energy shares were by far the weakest on the day, dropping 0.69 percent. A majority of the 44 components of the index were lower. Oilfield service company Schlumberger Ltd was the biggest drag, down 2.1 percent at $90.77.
"Less tension in the Middle East is always a positive, and any drop in gas prices will essentially act as a tax break for consumers going into the holiday shopping season," said Jeff Duncan, chief executive of Duncan Financial Management in St. Louis. "This is a real benefit for the economy."
U.S. trading is expected to be light this week, with markets closed on Thursday for the Thanksgiving holiday and early on Friday.
In Japan, a major oil importer, shares got an extra boost from a weaker yen to surge 1.5 percent. The Nikkei average has gained almost 11 percent in a little more than two weeks.
The Japanese currency, which typically falls when share prices rise, had touched a sixth-month low of 101.91 yen to the dollar as investors sold it to buy higher-yielding assets elsewhere.
The dollar last traded up 0.43 percent at 101.70 yen, while the euro slid 0.46 percent to 1.3496 against the dollar.
The fall in oil prices weighed on most commodity-linked currencies, with the Canadian dollar dropping to a 4 1/2-month low of C$1.0584. Against an index of six major currencies, the dollar was 0.37 percent higher.
Prices of U.S. Treasuries edged up slightly as housing data proved weaker than expected.
Contracts to buy previously owned U.S. homes fell for a fifth straight month in October, hitting a 10-month low and adding to signs of cooling in the housing market. The 10-year U.S. Treasury note rose 4/32 in price to yield 2.7391 percent.
German Bunds rose after European Central Bank policymakers said there was room for more rate cuts as the prospect of lower oil prices after the Iran deal added to a low inflation outlook.
German Bund futures settled 37 ticks higher at 141.32, pushing 10-year German yields 2.8 basis points lower to 1.73 percent.