* MSCI world equity index down 0.4 percent at 340.65
* Renewed rise in oil prices fan concerns
* Dollar steady ahead of key central bank policy meetings
By Natsuko Waki
LONDON, Aug 4 (Reuters) - World stocks slipped on Monday as oil's renewed rise fanned concerns about its impact on corporates and consumers in a week when the Federal Reserve and other major central banks meet to decide on interest rates. Wall Street fell on Friday after General Motors <GM.N> reported a $15.5 billion quarterly loss -- the third largest in its 100-year history -- as sales dropped, highlighting how rising oil prices are hurting consumer spending.
None of the central banks in the United States, euro zone, the UK and Australia is set to change the cost of the borrowing this week as they face slowing growth due to the credit crisis and rising price pressures given high energy prices.
Oil rose back above $126 a barrel at one point on Monday on supply worries, lifted by concern over Iran's nuclear activities, a tropical storm that has formed near the Gulf of Mexico and further violence in OPEC member Nigeria.
"We've seen a lot of worries about demand slowing in the past couple of weeks but now it seems like the focus has switched back to supply concerns," said Gerard Burg, a commodities analyst at National Australia Bank in Melbourne.
After scoring one of the historically steepest falls from a record high above $147 in July, U.S. light crude <CLc1> rose 0.75 percent to $126.04 a barrel before losing some its gains to $125.52 at 0820 GMT.
The United States said on Sunday that Iran had left the U.N. Security Council no choice but to increase sanctions on the Islamic republic for ignoring demands that it halt sensitive nuclear activities, stirring concerns of a potential confrontation that could disrupt supply.
The FTSEurofirst 300 index <
> fell 0.3 percent while the MSCI main world equity index <.MIWD00000PUS> lost 0.4 percent to hit its weakest level in almost a week.Financial stocks weakened in Europe ahead of the results from HSBC <HSBA.L>, Europe's biggest bank.
This week marks the final peak week for second quarter earnings reports in the United States.
According to Thomson Reuters data, the second quarter blended growth rate for S&P 500 firms, which combines actual numbers for companies that have reported and estimates for companies yet to report, stands at -20.4 percent.
If this rate is confirmed as the final number, it will mark the first time the S&P 500 has recorded four consecutive quarters of negative growth since Q2 2001-Q1 2002.
CENTRAL BANKS MEET
Central banks reminded investors last week of their determination to tackle the one-year-old crisis by extending emergency lending facilities for investment banks and expanding other liquidity programmes to ease strains in the money market.
Although the main central banks look set to leave rates unchanged this week, investors are keen to know their views on the fresh market turmoil in July, volatile oil prices and the impact on the broader economy.
"The economic situation is too weak now for big steps to be taken -- negative economic surprises from the euro zone are the most common for the moment, which is a fact the ECB will have to keep in mind," said Thierry Lacraz, strategist at Pictet in Geneva.
Some analysts say inflation pressures will eventually subside as high oil prices would weigh on growth, allowing central banks to cut interest rates to boost the economy.
"While the ECB thus far have been entirely inflation- focused, we do not believe they will be immune to the weakening of growth," said Sean Maloney, rate strategist at Nomura.
"This is especially true as our analysis suggests the inflation peak may well have been achieved ... barring of course any dramatic upside reversal to oil/food prices."
The dollar was steady against a basket of major currencies <.DXY>, surrendering some gains made on Friday after data showed U.S. companies cut fewer-than-expected jobs.
Among other major currencies, the Australian dollar rose 0.2 percent against the U.S. currency <AUD=> after hitting a 3-month low on Friday.
It has suffered as investors have been caught off-guard by a sharp shift in expectations towards interest rate cuts, tumbling nearly 3 percent against the dollar and yen last week for its biggest weekly drop since the Bear Stearns investment bank collapse in March.
Emerging sovereign spreads <11EMJ> tightened 1 basis point while emerging stocks <.MSCIEF> fell 0.7 percent.
The September Bund future <FGBLU8> rose 22 ticks as government bonds drew safe-haven demand as stocks weakened.
Gold <XAU=> tracked oil higher to $913.20 an ounce. (Additional reporting by Sitarama Shankar and Emelia Sithole-Materise, editing by Stephen Nisbet)