Sept 28 (Reuters) - Slovak producer prices rose 0.6 percent month-on-month in August, above market expectations, putting the annual inflation rate for factory-gate costs (PPI) at 8.8 percent, data showed on Thursday. KEY POINTS: PRODUCER PRICES Aug 06 July 06 Aug 05 pct change month/month +0.6 +0.6 +0.8 pct change year/year +8.8 +9.0 +5.6 - Analysts polled by Reuters had forecast a producer price rise of 0.3 percent on a monthly basis in August, and 8.5 percent on an annual basis <SK/ECON04>. - Of the three PPI categories, growth in prices of industrial products rise by 0.3 percent on the month, after a 0.8 percent rise in July. - Prices of electricity, gas, steam and hot water increase by 0.9 percent, month-on-month, in August, up from a 0.3 percent rise matching their annual rise from the previous month. - Prices of raw materials fall 0.1 percent, after a 2.4 percent monthly rise in July. - Within industrial products, refinery goods up 0.3 percent month-on-month, after a 3.6 percent jump in June. MARKET REACTION: - The Slovak crown showed no immediate reaction to the data. It traded at 37.390 to the euro on Thursday, little changed from Wednesday's close. BACKGROUND: - Slovak producer prices have shot up this year mainly due to the higher cost of oil and natural gas. - Accelerating PPI has coincided with increasing risks for consumer inflation, which prompted the central bank to raise interest rates by 25 basis points in September, a fourth rise in 2006. - The central bank reiterated a hawkish tone after the September monetary policy meeting and said more policy tightening was likely this year if upward pressures on prices persists. - Analysts widely expect the central bank to raise interest rates further in 2006 to slash inflation and make Slovakia eligible for adopting the euro in 2009. - The central bank expects to miss its end-2007 consumer inflation target of 2.0 percent, but a slowdown in price growth in 2008 will allow Slovakia to meet the euro adoption criteria. LINKS: - For further details on August producer prices, Reuters 3000 Xtra users can click on the statistics office's website: http://www.statistics.sk/webdata/english/index2_a.htm - For LIVE Slovak economic data releases, click on......<ECONCZ> - Schedule of upcoming indicator releases............<SK/ECON09> - Summary of short-term economic data forecasts......<SK/ECON04> - Stories on Slovak currency moves........................[SKK/] - Slovak speed money guide ..............................<CZK/1> - Slovak benchmark state bond prices .................<0#SKBMK=> - Slovak forward money market rates ....................<SKKFRA> ((Reporting by Peter Laca; Editing by Alan Crosby; bratislava.newsroom@reuters.com; Reuters Messaging: martin.santa.reuters.com@reuters.net; +421 2 5341 8402)) Keywords: ECONOMY SLOVAKIA PPI