0823 GMT - Shares of European semiconductor companies are mixed toward the end of a turbulent week for global technology stocks. The Nasdaq composite closed at a new record earlier in the week, but stocks exposed to artificial intelligence came under pressure later on as concerns around debt and investment returns resurfaced. In Europe, shares of Dutch semiconductor-equipment maker ASML Holding and smaller rival ASM International are down 0.6% and 1%, respectively. French semiconductor-materials maker Soitec is up 7.3%. German chip maker Infineon Technologies gains 1%. STMicroelectronics shares are down 0.5%. Meanwhile, the E-mini Nasdaq 100 futures contract is up 0.8%, pointing to a positive opening for tech stocks in the U.S.