*What: industrial output flash estimate
*When: due by Aug 2
*Median forecast sees 17 percent y/y drop
By Mirka Krufova
PRAGUE, July 24 (Reuters) - The dive in Czech industrial output may have slowed in June as key export market the euro zone began to show signs of a recovery and thanks to calendar effects, a Reuters poll showed on Friday.
Thirteen economists polled by Reuters between July 22 and July 24 produced a median forecast for a 17 percent annual decline, with the most pessimistic forecasting 20.4 percent plunge and the most optimistic a 12.5 percent fall.
The Czech statistics bureau is expected to release a flash estimate for June industrial output between July 28 and August 2.
The June number will show an eighth double digit tumble in a row, illustrating how a lack of demand in the recession-hit euro zone has been strangling Czech output, most of which is aimed for exports to the West.
The Czech economy shrank by 3.4 percent in the first quarter, and the Finance Ministry expects a 4.3 percent full-year decline.
But analysts said the June reading could mark a turnaround in the negative trend as better data coming from the euro zone probably mean Czech industry has rebounded.
"First signs of stabilisation in output could appear based on May data from France and Germany, both output and industrial orders," said David Marek, chief economist at Patria Finance.
This year's June had one more working day than June in 2008 while May has one less working day this year compared with the last year, another factor helping the June data, Marek said.
Jaromir Sindel, chief economist at Citibank in Prague, said an improvement in German industrial activity along with the temporary impact of a scrap subsidy in some EU countries should help the Czech data.
The subsidy for buying new cars in turn for scrapping old ones is key for Czech industry, heavily focused on cars and car parts.
South Korea's automaker Hyundai Motor Co <005380.KS> said earlier this month it would invest $183 million in its Czech unit over the next two years to boost its gear unit production as demand for its small, cheaper cars has picked up.
But Sindel said Czech orders have lagged the improvement in confidence indicators such as the Purchasing Managers Index (PMI), which was at a nine month high in June although still below the critical 50 mark.
Radomir Jac from Generali PPF Asset Management said the relatively bad Czech data compared with confidence surveys were due to excessive inventories at companies.
"It is a question of time when Czech companies sufficiently reduce their excessive inventories and level of de-stocking was actually already very robust in previous months... Once excessive inventories are reduced, industrial output should start to report less negative results," Jac said.
Analysts agreed the pace of a decline in output would slow further in the second half of the year as industrial production in the small and open Czech economy reflects better the improving trends in the euro zone. (Writing by Jana Mlcochova; Editing by Andy Bruce)