* MSCI world equity index down 0.65 pct at 338.18
* Merrill writedowns, weak economic data add to gloom
* Oil rises on supply concerns, New Zealand dollar slides
By Natsuko Waki
LONDON, July 29 (Reuters) - World stocks hit a two-week low on Tuesday after Merrill Lynch <MER.N> said it would take a $5.7 billion writedown to offload toxic debt, upsetting investors already nervous about the health of the financial sector.
Data from major economies added to the gloom, as French consumer morale, UK retail sales and mortgage approval hit record lows while Japan's jobless rate set a near two-year high in an economy that probably contracted in the second quarter.
Oil rose for a second day in a row from last week's seven-week trough as tensions in Iran and Nigeria stirred supply concerns, while the New Zealand dollar slid after a media report on liquidity problems at one of the local funds. The news from Merrill, the third largest U.S. bank, came after U.S. regulators closed two regional banks on Friday, marking the sixth and seventh bank failures this year as the sector suffers from the deepest housing slump since the Great Depression.
That series of events, combined with mixed quarterly results, raised concerns that the fallout from the credit crisis has much further to run.
"The banks are obviously suffering badly from the hands of Merrill Lynch," said David Buik, strategist at BGC Partners.
"Sentiment is very brittle. There is considerable concern that we are going to see more banking writedowns in the next two or three months."
The FTSEurofirst 300 index <
> fell 1 percent while the MSCI main world equity index <.MIWD00000PUS> lost 0.7 percent to hit a near two-week low, having fallen for four days in a row.U.S. stock futures were down around 0.1 percent <SPc1>, pointing to a weaker start on Wall Street later.
Merrill said it would raise $8.5 billion by selling new stock and in a sign of how toxic its debt holdings have become, it agreed to sell $30.6 billion of collateralised debt obligations (CDOs) for about 22 cents on the dollar.
The bank unveiled its third-quarter writedown less than two weeks after posting a $4.9 billion second-quarter loss.
LIQUIDITY SCARE
The New Zealand dollar <NZD=> was the day's main loser in the currency market, falling as much as 0.8 percent to $0.7394 after New Zealand Press Association said local fund Guardian Trust has suspended new investment and withdrawals in one of its funds worth NZ$249 million due to liquidity issues.
"Whilst the deteriorating growth backdrop and bias for the Reserve Bank of New Zealand easing has been the major driver for our bearish NZD call versus euro, the news of negative developments in the New Zealand financial sector merely adds to the list of negatives for the currency," JP Morgan said.
The news comes after Hanover Finance, the country's fifth-largest non-bank finance firm, suspended repayment of loans and interest last week.
More than 20 non-bank finance companies have collapsed or sought to delay and restructure the repayment of deposits worth close to NZ$2 billion in the past two years.
Asset managers and corporates around the world have suffered the rise in the cost of borrowing as a result of the one-year-old credit crisis originating in the troubled U.S. housing market.
The International Monetary Fund said on Monday the bottom of the U.S. housing downturn was not yet visible and kept its estimate that losses in U.S. assets related to the subprime crisis could reach $1 trillion.
The dollar steadied against a basket of major currencies <.DXY>. It rose 0.2 percent to 107.55 yen <JPY=> having risen above 108 on Monday.
Emerging sovereign spreads <11EMJ> tightened 1 basis point while emerging stocks <.MSCIEF> fell 1.5 percent.
The September Bund future <FGBLU8> rose 21 ticks as safe-haven government bonds attracted risk averse capital.
U.S. light crude <CLc1> rose 0.3 percent to $125.24 a barrel -- still more than $20 below its record high -- while gold <XAU=> rose to $931.35 an ounce. (Additional reporting by Dominic Lau; Editing by Victoria Main)