* MSCI world equity index up 0.4 pct at 291.79
* UBS leads European gains after strong results
* Euro near two-month peak vs dollar
By Natsuko Waki
LONDON, July 27 (Reuters) - World stocks hit a 2-1/2 month high on Tuesday while the euro held near a two-month peak versus the dollar as upbeat results from Swiss bank UBS <UBSN.VX> added to a recent run of strong corporate earnings.
Global banking supervisors' plans to scale back proposals to beef up bank capital and liquidity rules also came as a relief to investors who had feared tough rules would hit the profitability of the financial sector.
UBS rose more than 9 percent after saying strong equities and currency revenues drove its second-quarter net profit well above forecasts. [
]In the United States, 78 percent of the 175 companies in the benchmark S&P 500 index <.SPX> have reported earnings above analyst expectations, according to Thomson Reuters data.
The strong corporate performance in the second quarter has eased concerns that the global economy might slow down towards the end of the year as fiscal stimulus runs out and austerity programmes hit consumer spending.
"Expectations are rising for earnings. Companies are guiding full-year forecasts up in spite of concerns about a loss of recovery momentum ... and that is helping to keep these markets reasonably firm," said Mike Lenhoff, chief strategist at Brewin Dolphin. MSCI world equity index <.MIWD00000PUS> rose 0.5 percent to hit its highest level since mid-May. The Thomson Reuters global stock index <.TRXFLDGLPU> gained 0.3 percent.
The FTSEurofirst 300 index <
> rose 0.7 percent. Banks were top gainers, rising 4 percent <.SX7P>.U.S. stock futures rose half a percent <SPc1>, pointing to a firmer start on Wall Street later.
Emerging stocks <.MSCIEF> added 0.7 percent to come into positive territory for the year for the first time in 2-1/2 months.
The Basel Committee said it would scale back many of its proposals to beef up bank capital and liquidity rules, signalling concessions in the face of lobbying by banks and governments. [
]The committee published a draft Basel III reform in December that would force banks to hold more and better quality capital to withstand future shocks without taxpayer help again.
U.S. crude oil <CLc1> erased early losses to rise 0.1 percent on the day to $79.07.
German bund futures <FGBLc1> were steady on the day.
The premium that investors demand to hold 10-year Spanish <ES10YT=TWEB> and Irish government bonds <IE10YT=TWEB> rather than euro zone benchmark German Bunds <DEU10YT=TWEB> fell to multi-week lows as investors switched into higher yielding issues.
Only seven of 91 European banks failed health-check tests on their financial standing announced late last week -- five small Spanish banks, Germany's state-rescued Hypo Real Estate and Greece's ATEbank. No listed bank failed the tests.
"As expected, the transparency has helped, with peripheral yield spreads versus Germany moving lower," Barclays Capital said in a note to clients.
"It is interesting to note that this narrowing has been the most pronounced for Spain, the country with the largest number of 'failed' banks. We feel it is precisely this transparency that has helped the narrowing of the yield spreads."
The dollar <.DXY> was steady against a basket of major currencies, while the euro rose 0.1 percent to $1.3000 <EUR=>, within half a cent of a two-month peak around $1.3029. (Additional reporting by Harpreet Bhal; Editing by Hugh Lawson)