* MSCI world equity index up 0.6 pct at 234.47
* Banks lead a rally in stocks
* Euro hits one-month high; yen lower
By Natsuko Waki
LONDON, May 5 (Reuters) - World stocks raced to their highest level in almost four months on Tuesday while the euro hit a one-month high against the dollar as increasing optimism about banks prompted investors to buy riskier assets.
Investors are anxiously waiting for the result of a stress test on 19 U.S. banks due this week. A source told Reuters that about 10 banks would be told they needed to increase the size of their capital cushions. [
]Another source told Reuters that an expected first-quarter loss for insurer American International Group <AIG.N> would not trigger a new capital injection from the government.
The benchmark MSCI world equity index <.MIWD00000PUS> is now in positive territory for the year as one in three companies which reported first-quarter earnings so far has surprised on the upside and recent data showed the worst might be over for the global economy.
"People have been wanting to price in the turning point for quite a while," said Georgina Taylor, equity strategist at Legal & General Investment Management.
"Now you're getting the data to back it up, a combination of top-down macro data and some better than expected earnings. The market is starting to price in a recovery.
"With the stress tests it may be a case of 'better the devil you know' - get them out of the way and then move on." The MSCI world equity index rose 0.6 percent, hitting its highest level since early January. The index is now up 2.7 percent this year, after falling 43 percent last year.
The FTSEurofirst 300 index <
> rose 1.1 percent with the banking sector one of the biggest risers, while emerging stocks <.MSCIEF> rose two thirds of a percent.U.S. stock futures were mixed <SPc1> after a rally drove the S&P 500 index <.SPX> into positive territory for the year on Monday.
"There seems to be an incredible amount of optimism around at the moment," said David Jones, chief market strategist at IG Markets.
A clutch of major U.S. companies report their Q1 results this week. Thomson Reuters data shows that so far, 66 percent of 326 companies in the S&P 500 index have reported earnings above analyst expectations.
In aggregate, U.S. companies are reporting earnings that are 10.4 percent above the estimates, which is above the long-term average of around 1.6 percent.
On the macroeconomic side, manufacturing surveys have suggested the worst may be past in Asia and Europe, while U.S. data on Monday showed pending sales of existing homes rose unexpectedly in March, following a pick-up in consumer confidence there.
ADDING RISKS
The euro hit a one-month high of $1.3437 <EUR=> as rallying equities and optimism over the economy spurred buying in riskier currencies.
The Australian dollar held near a seven-month high around US$0.7426 <AUD=> after the country's central bank left its key cash rate at 3 percent as expected, pointing to signs of stabilisation abroad.
The dollar was up 0.1 percent <.DXY> against a basket of major currencies while the yen was slightly weaker at 99.08 per dollar <JPY=>.
U.S. crude oil <CLc1> fell a quarter percent to $54.35 a barrel -- which is still close to a 2009 high.
The June Bund future <FGBLc1> was little changed with focus on a monetary policy verdict from the European Central Bank on Thursday. (Additional reporting by Brian Gorman, editing by Mike Peacock)