* Financial headwinds may keep U.S. Fed from hiking rates
* Dollar index slides to lowest in three months
* Investors sceptical on Venezuela lobbying for oil cuts
By Eric Onstad
LONDON, Feb 4 (Reuters) - Gold and zinc surged to their highest in over three months on Thursday, buoyed by a tumble in the dollar, while oil failed to build on sizzling gains in the previous session as doubts grew about whether producers would agree to cut output.
The dollar tripped to its lowest levels in three months against a basket of currencies .DXY , supporting commodities priced in the U.S. currency by making them cheaper for buyers outside of the United States. FRX/
A collapse in expectations of a further rise in U.S. interest rates this year drove the dollar index to its biggest daily fall in over two months on Wednesday.
"The (Fed funds futures) now sees only a 12 percent probability of a rate hike in March so I am not expecting the price of gold to drop soon," said Bernard Dahdah, an analyst at Natixis, adding he expected it to trade around current levels in the next two months.
Spot gold XAU= touched $1,147.40 an ounce on Thursday, its highest since Oct. 30, after rallying 1.2 percent on Wednesday, the biggest daily gain since Jan. 20. GOL/
Rising U.S. rates make a non-yielding asset such as gold less attractive.
Gold has now gained nearly 8 percent since the start of this year as uncertainty about the health of the global economy has made financial markets volatile, pushing investors into safer assets.
Gold helped the Thomson Reuters Core Commodity Index .TRJCRB to edge up by 0.2 percent after a gain of 2.5 percent on Wednesday.
The index of 19 commodities is down nearly 7 percent this year after dropping by a quarter in 2015 to hit its lowest level since 2002 in December, as commodities ranging from iron ore to oil took a battering.
Industrial metals also rallied on Thursday. MET/L
Benchmark zinc on the London Metal Exchange CMZN3 surged to a peak of $1,726.50 a tonne, the strongest since Oct. 29, on concern about potential shortages.
The wider metals market, including copper and aluminium, got support from the weak dollar and investors closing out bearish positions before the Lunar New Year holiday in China.
Oil, however, failed to build on Wednesday's 7 percent jump. O/R
Brent crude LCOc1 dipped below $35 a barrel, pressured by oversupply and scepticism that Venezuela's effort to lobby crude producers for output cuts would succeed.
Prices have gained almost 30 percent since falling to $27.10, the lowest since November 2003, on Jan. 20.
"It's a non-starter," Carsten Fritsch, analyst at Commerzbank (DE:CBKG), said of Venezuela's effort. "Without Saudi Arabia it would not make sense anyway."
In agricultural markets, U.S. corn and soybean prices edged higher with support from the falling dollar, but favourable weather for South American crops helped keep prices shy of six-week highs hit this week. GRA/