* U.S. CPI data for June expected to slow sharply

* Dollar sags to 2-month low

* World stocks and bond prices rise for third straight day

* Gold inches to 3-week high

LONDON, July 12 (Reuters) - Bets on a screeching slowdown in U.S. inflation data later saw traders shove the dollar to a 2-month low on Wednesday and push stocks up and bond market borrowing costs down for a third day running.

Economists polled by Reuters expect to see June U.S. consumer price inflation slow to 3.1% from 4% in May, which might be enough to convince the Federal Reserve to end its aggressive rate hikes - if not this month, at least soon.

Europe's main stock markets had opened 0.7% higher , led once again by the high-flying tech sector, and MSCI's main 47-country world index was up a full 20% from rate hike-induced lows hit in October.

The currency market was moving too. The dollar's low meant it notched its longest losing stretch since March. The yen clambered back above 140 and sterling hit a 15-month high as the Bank of England said the UK was coping with higher interest rates.

"Risk assets, as usual, seem to take the best out of whatever is happening." said James Athey, an investment director and fund manager Abrdn in London.

For the CPI data, the core reading which strips out volatile elements such as energy prices, will matter the most for markets, he added.

"If it doesn't give the impression of the immediate cessation of these price pressures we could see a reversal of some of these more recent market moves," Athey said, such as the rebound in the yen and drop in short-term U.S. bond yields.

That core rate is expected to have dropped for a third month to 5% from 5.3%, according to the Reuters poll, though that is more than double the Fed's 2% target.

Markets are pricing in a 92% chance of a 25-basis-point Fed hike later this month, the CME FedWatch tool showed, but remain doubtful of further hikes after that.

Wednesday's moves saw euro zone bond yields inch lower, with Germany's 10 year yield dipping to 2.62%, having hit a four-month high of 2.679% on Monday. U.S. Treasury yields were a touch lower as well, with the 10-year Treasury yield now at 3.95%.

Saxo Markets strategists said traders were likely to continue to keep the odds for September and November rate hikes low if the core inflation rate decelerates as anticipated.

Investor attention will also be on the Bank of Canada, with analysts expecting a second consecutive quarter-point rate hike at its upcoming meeting.

In June, the central bank raised its overnight rate to a 22-year high of 4.75% after a five-month pause, saying monetary policy was not restrictive enough. It then said further moves would depend on economic data.

LINGERING FEAR

A speech by Bank of England governor Andrew Bailey was on the watch list as well, though this will be about financial stability so may have little impact on expectations for monetary policy.

"The great lingering fear among central banks is that the longer it takes to bring down inflation, the greater the risk of it becoming entrenched," Betashares chief economist David Bassanese said in a note.

Overnight in Asia, Australia's S&P/ASX 200 index rose 0.4%, while the bouncing yen knocked Japan's Nikkei down 0.8%.

Hong Kong's Hang Seng Index rose 1% whereas bluechip Chinese shares fell 0.7% as tech stocks there jolted 2.5% lower amid renewed concerns about Beijing's attitude to the sector.

In the U.S., futures were pointing to a higher start for Wall Street later. The Q2 earnings start to roll in this week, with heavyweight banks JPMorgan, Citigroup and Wells Fargo kicking things off as usual.

Wall Street banks overall are expected to report higher profits as rising interest payments offset a downturn in dealmaking.

Back in the currency market, the dollar index, was down 0.25% at 101.47 as Europe got into its stride.

The yen's continued ascent took it to 139.59 per dollar and meant it has risen nearly 4% from a seven-month low of 145.07 last month, a level that had put traders on alert for possible intervention from Japanese authorities.

The New Zealand dollar was up 0.26% in choppy trading after the country's central bank kept interest rates unchanged at 5.50%. The euro rose to $1.1027, the pound hit $1.2970 while the Swiss franc hit a 2-1/2 year high of 0.8765.

Among commodities, Brent oil futures were up 0.4% at $79.70 per barrel, U.S. crude rose 0.3% to $75.07 and gold inched up to a near 3-week high of $1,934.5 an ounce.

(Additional reporting by Ankur Banerjee in Singapore Editing by Mark Potter)