BRATISLAVA, Nov 15 (Reuters) - The Slovak economy rose by a record 9.8 percent in the third quarter of 2006, data showed on Wednesday, pushing the crown currency to all-time highs against the euro. The preliminary flash estimate of the third quarter GDP, released by the Statistics Office, was well above the market forecast of a 6.6 percent rise, and boosted the crown to 35.720 to the euro. The flash estimate does not contain any details of the economy's structure, but Slovakia has been showing one of the highest growth rates in the European Union since it joined it in 2004, thanks to accelerating household consumption and rising investments to the key automotive industry. "On the consumption side, GDP growth was influenced mainly by continued foreign demand and growth in inventories of materials and finished products," the Statistics Office said. Because of the lack of any breakdown of the preliminary GDP figure, analysts were at odds over the implications of strong economic growth. "This figure means that growth is healthy, and surprisingly high imports in the previous months will translate into exports in the future, and not into consumption, as some may have feared," said ING Bank senior economist Lucia Steklacova. "If growth is based on a healthy structure, the crown will firm further, and there will not be an urgent need to raise interest rates," Steklacova added. But Danske Bank analysts said in a report the strong GDP readings meant the central bank will have to tighten monetary policy further to tame upward pressure on shop prices. "Further rate hikes are very, very likely. The Slovak economy is obviously overheating. A boom-bust scenario looks more and more likely," Danske Bank said in a flash comment. The central bank has raised interest rates by 175 basis points in four steps this year to fend off inflation risks stemming from high energy prices and rising domestic demand. ((Reporting by Peter Laca, editing by Chris Pizzey; Reuters Messaging: peter.laca.reuters.com@reuters.net; +40 21 315 8320;)) Keywords: ECONOMY SLOVAKIA GROWTH