** Semiconductor material supplier Soitec's SOIT.PA stock falls around 12%, to the bottom of France's SBF120 index
** Analysts could not point to a company specific reason for the fall, but note Soitec's stock volatility
** The stock is on track for its biggest daily loss since May, if losses holds; it rose 26% since September 12
** Peers in the European chip sector decline amid broader sell-off in stocks as U.S.-China trade tensions hit sentiment
** ASM International ASMI.AS and BESI BESI.AS slide 2-3%, both at the of Amsterdam's AEX index .AEX; Europe's broader technology index .SX8P falls 1% at 1203 GMT
(Reporting by Nathan Vifflin in Gdansk)
((nathan.vifflin@thomsonreuters.com; +48 58 769 67 13;))