European stocks showed little change at the open on Monday, as fears over reaching an agreement on the U.S. debt ceiling and expectations for U.S. and European monetary policies impacted sentiment. The Stoxx 600 index was steady after hitting its highest level in over a year on Friday. The banking and mining sectors were among the biggest losers, while healthcare stocks rose. The German DAX index fell by 0.1% after reaching an all-time high in the previous session. European chipmaker stocks were under pressure after China's cyberspace regulator stated that "products from U.S. memory chip maker Micron Technology failed a network security review and that it will prevent major infrastructure operators from purchasing from the company." Shares of Infineon Technologies, STMicroelectronics, and ASM International declined. Conversely, Novo Nordisk's stock rose by 2.3% after research indicated that its new obesity drug may help reduce the risk of heart diseases in addition to promoting weight loss.