* World stocks hit by trade war fears
* Italian bonds, stocks bounce on hope vote may be averted
* Euro rises off 10-month lows vs dlr; bounces vs yen, franc (Updates throughout)
By Sujata Rao
LONDON, May 30 (Reuters) - Hopes that Italy might avoid a potentially damaging general election lifted European markets on Wednesday, bringing Italian bond yields off multi-year highs and dampening some of the recent buying interest for German and U.S. government bonds.
The backdrop for world markets remained sombre, however, as the United States revived trade war fears with an announcement that it would press ahead with tariffs and restrictions on Chinese investments, and Beijing threatened to retaliate.
The prospect of acrimony between the world's biggest two economies added to fears for the global economy, already feeling the hit from the risk of an Italy-driven crisis in the euro zone.
However, equity futures signalled Wall Street indexes would open around half a percent higher, after the previous day's harsh session and losses across Asia earlier on Wednesday, where a key equity index shed more than 1 percent.
World stocks slipped 0.2 percent, heading for their sixth day in the red, but European shares made tentative gains after falling almost 4 percent in the past five days.
The recovery was partly driven by news that Italy's two anti-establishment parties were again renewing efforts to form a government, rather than force the country back to the polls for the second time this year.
Another positive was a smooth auction of Italian debt that raised 5.57 billion euros, easing concerns about Rome's ability to finance itself.
"(The auction) clearly indicates that investors still have faith in the Italian economy, if not the government," said Seema Shah, global investment strategist at Principal Global Investors. But she warned that political uncertainty would remain elevated.
Japan's biggest private life insurance firm, Nippon Life, which holds some 4.8 trillion yen ($44 billion) worth of euro zone bonds, said it had no plans for now to buy or sell its Italian debt holdings.
Milan-listed equities snapped a five-day losing streak and bounced almost 2 percent while short-dated Italian bond yields - a sensitive gauge of political risk - fell more than half a percent from half-decade highs.
They had suffered their worst day in nearly 26 years on Tuesday. Ten-year Italian yields slipped 18 bps.
The risk for investors is that eurosceptic political parties are further boosted, with any election viewed as a de facto referendum on Italy's euro membership.
The events have evoked memories of the 2011-2012 euro debt crisis, with potentially huge implications for the single currency.
The risks had sent investors scurrying for safer German and U.S. governmment bonds as well as currencies such as the yen and Swiss franc, at the expense of the euro.
That safe-haven trend receded on Wednesday, with the euro bouncing almost one percent versus the dollar and recouping all its Tuesday losses, which had taken it down to 10-month lows . It also rose between 0.7 percent and one percent against the Swiss franc and yen respectively.
"The political problems in Italy heighten the risk of a systematic problem within the euro zone and within the euro zone financial system, but that is still a risk rather than a probability," said Laith Khalaf, senior analyst at Hargreaves Lansdown.
The improved mood encouraged investors to sell U.S. and German bonds, reversing some of the 15-20 bps yield rises seen on Tuesday. U.S. 10-year yields jumped more than 10 basis points to 2.87 percent while their German counterparts were up 8.5 basis points.
Most investors remain cautious though, with Goldman Sachs cutting its forecast for the euro's exchange rate against the dollar due to Italian political developments. It said it now expected the euro to trade at $1.25 in 12 months' time versus its previous $1.30 prediction.
With brewing trade conflicts, world growth is another concern. The Organisation for Economic Cooperation and Development warned in its latest report that a trade war was threatening the growth outlook.
That is likely to weigh especially hard on the developing world - emerging equities were down more than one percent to 5-1/2 month lows while Shanghai shares dropped 1.4 percent.
Emerging markets are also suffering from the dollar's surge since mid-April, with Indonesia raising interest rates for the second time in two weeks to support the rupiah currency.
"Italian politics mask the underlying growing risks of a U.S.-China trade war," ING Bank analysts told clients.
Reporting by Sujata Rao; additional reporting by Tomo Uetake and Hideyuki Sano in Tokyo and Swati Pandey in Sydney; editing by Andrew Roche