* 2009 earnings growth forecast raised to 20 pct from zero
* Stock index could rise 15 pct over next 3 months
* Mainland rally could boost China-related stocks overseas
* Yuan appreciation expectations may boost banks, airlines
* Early exit from stimulus policy could derail market uptrend
SHANGHAI, Nov 5 - Unexpectedly strong earnings at listed Chinese companies have spurred analysts to raise their profit forecasts, creating room for about a 15 percent rise in Shanghai's benchmark stock index over the next three months.
The upbeat earnings, fed by China's steady economic recovery, are restoring optimism in the stock market after last quarter's gloom, but the rally could be derailed if the government moves more quickly than expected to tighten monetary policy.
"It's very clear that corporate earnings, propelled by the economy's recovery, are now improving much more quickly than the market had expected," said Wu Xiong, research manager at Orient Securities in Shanghai. "Investors could now adjust their investment strategy and take a much more optimistic approach."
Mainland-listed firms' combined net profit rose 26 percent in the third quarter from a year earlier, leading analysts to boost their forecasts for 2009 Chinese corporate earnings growth to 20 percent from a flat performance forecast just two months ago.
That cut the average forecast price/earnings ratio of stocks. The 12-month forward P/E ratio on Shanghai A-shares stands at 18.3 as of November, down from 22.6 in August and well below the all-time high of 35.1 hit in 2007 during the market's bubble peak, data from Thomson Reuters I/B/E/S shows.
The lower PEs, considered reasonable given China's growth potential, give China's benchmark Shanghai Composite Index room to rally in the coming three months or so by around 15 percent from its current level.
That would see the index breach its 2009 high of 3,478 points in early 2010, eight fund managers, analysts and economists surveyed by Reuters this week said.
In a previous survey in early September, Orient Securities' Wu and the others proposed a defensive investment strategy, partly because of high stock valuations.
The market has staged several good-sized technical corrections since August, however, that have trimmed valuations.
The index closed on Thursday at 3,155 points, up more than 70 percent since the start of the year but down 9 percent from the year's peak hit in early August.
YUAN APPRECIATION
China's nearly 1,700 listed firms ended their third-quarter results reporting season last weekend with a combined quarterly net profit of 290 billion yuan ($42 billion).
Analysts now expect a big fourth-quarter profit rise, especially given a very low base of just 37 billion yuan a year earlier, when listed firms took large provisions and destocking was at its peak as the global financial crisis dampened demand.
With the yuan widely expected to renew its rise against the dollar, market players said firms with substantial local-currency assets, such as banks and property counters, or with most of their costs in dollars, such as airlines, to outperform.
"As China's economy recovers and exports improve in coming months, renewed yuan appreciation should not be a surprise," said a manager at a Chinese mutual fund in Shenzhen, who could not be quoted by name as he was not authorised to talk to the media.
"So firms with significant yuan assets will see those assets appreciate gradually and earnings of companies with most of their spending priced in dollars will be boosted by cost-cutting."
The rally could also spill over into overseas stocks related to China, including components of MCSI China such as Geely Automobile Co and American Depository Receipts of New York-listed Chinese firms such as oil giants Petrochina and Sinopec.
In addition, it could offer fresh impetus for foreign funds to enter the Chinese market, after a recent relaxation of restrictions on foreign portfolio investment.
Analysts said a key factor that could derail a market uptrend would be an early exit from Beijing's relatively loose monetary policy -- for example, an interest rate hike before the start of the second quarter -- as improvement in both the domestic and global economies makes it easier to return to a more normal policy stance.
After a series of strong economic data issued in mid-October, including 8.9 percent third-quarter GDP growth, and an industry survey this week showing China's manufacturing sector expanding at its fastest pace in 18 months, evidence is mounting of strong momentum in the world's third-largest economy.
Overseas, Australia has raised interest rates twice since early October, its first hikes since March 2008, while Norway became the first European country to raise rates last week.
And despite Beijing's emphasis on policy continuity, a shift towards greater optimism in official rhetoric has unsettled the financial markets.
The indicated yield of China's benchmark five-year government bonds has jumped nearly 20 basis points since late September, reaching its highest level in a year this week.
"Pressures are building due to fears of monetary tightening, which may be a key deterrent for the index to rise sharply for now," said Shanghai Securities investment chief Zheng Weigang.
"Still, most market players believe an exit from pro-growth policies will be a gradual process, leaving enough of a time gap for the index to rise above its 2009 peak by early next year." ($1=6.83 Yuan)
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