* Middle East offers a boost for now
* Gold to profit until central banks raise rates
By Amanda Cooper
LONDON, March 2 (Reuters) - The bullion price's leap to record highs has been fuelled by the fear factor stemming from uprisings in the Arab world, but once calm is restored, gold's battle with the world's central banks begins.
In the six weeks since tanks rolled into the centre of Cairo to quell protests that deposed former Egyptian president Hosni Mubarak, gold has risen by nearly 10 percent to hit a record $1,436.40 an ounce on Wednesday as investors weigh up the likelihood of an oil price shock to the global economy.
Without the push for democracy sweeping North Africa and the Middle East that propelled oil above $110 a barrel to 2-1/2 year peaks, there was a strong argument bubbling in early 2011 that the global recovery was gaining traction and inflation was accelerating to warrant the developed world's central banks raising interest rates.
Now, investors are a lot less certain about the outcome of these increasingly bloody protests, which have eclipsed the prospect of gold-denting rate rises.
"Essentially, moving into gold, or silver, at this moment, is more about a play that events in the Middle East are going to deteriorate rather than get better," said RBS global commodities strategist Nick Moore.
"Prior to this event, gold was already richly priced ... but because every day ssems to bring fresh horrors in Libya, one can't rule out that there won't be some maniacal event that drives gold higher," he said.
GOLD-LINED
Investors often buy gold to protect their portfolios from the ravages of inflation. But when price pressures build enough to trigger a response from a central bank, gold can quickly switch from being a blessing to a non-yield bearing curse.
There is no doubt that record food prices and soaring energy costs are whittling away at consumer purchasing power and investor returns, driving real interest rates -- a benchmark rate minus inflation -- deeper into negative territory.
The lower the rate of interest, the greater the support to gold, which bears no yield of its own and therefore gets sidelined for stocks, high-yielding currencies and bonds when rates rise and returns improve.
BlackRock, which manages a total $3.6 trillion and is a major investor in gold and gold equities, said in February the key threat to the bullion market is "an increase in real interest rates. When these begin to rise, the opportunity cost of holding gold will encourage investors to sell the metal."
Real interest rates in the G7 economies are now all negative except in Japan, compared with five nations this time last year as inflation has picked up.
In the rest of the G20, which includes Brazil, China, India and Russia, real interest rates are negative in 6 of the 13 nations, compared with 5 this time last year.
So the heat is on the central banks not to lag in the fight against inflation, particularly in the emerging world, home to the top biggest gold buyers -- India and China, which has already raise rates three times since October 2010.
"There is lots of capital in China, they've got the same fears that any other investor would have and with inflation picking up, by holding renminbis you get negative real returns," said Deutsche Bank analyst Daniel Brebner.
"That doesn't make much sense and you have to look to hedge against that risk," he said, adding: "This is something we've been seeing and it will continue."
GOLDILOCKS AND THE G3 BEARS
Meanwhile, the gold/oil ratio -- the number of barrels of oil needed to buy one ounce of gold -- has fallen to its lowest since late 2008, the nadir of the global financial crisis, indicating oil's outperformance relative to that of gold.
But the effect of the Middle East turmoil on both assets has made this particular market gauge less representative of investor risk appetite or confidence in global growth.
"Both are inflation indicators but they can also be safe-havens sometimes, so there is some credibility behind this ratio, but don't read too much into it," said Commerzbank analyst Eugen Weinberg. "On the consumption side, those two commodities are not competing with each other."
Market-based inflation expectations have also picked up sharply from where they were six months ago.
The Federal Reserve and the European Central Bank are widely expected to withdraw emergency cash measures put in place during the financial crisis, while many emerging economies like China are tightening policy to combat inflation and "hot-money" inflows from yield-starved investors.
For now, even if gold loses its "peace dividend" from tensions subsiding in the volatile Middle East, it is still a long way off buckling under the weight of the central banks collectively allowing for higher inflation and stronger growth.
After all, aside from gold, no other major asset class has rallied for 10 years in a row, defying global boom and bust, inflation, deflation, oversupply or shrinking consumer demand.
(Editing by Veronica Brown and William Hardy)