European technology stocks were lagging in Thursday morning trading, following on from a wobble in Asian trading and a sell-off in the U.S. on Wednesday.

Europe's tech index, the Stoxx Europe 600 Technology, was under pressure early in the session, falling 0.16% to lead sector decliners around the region and extend its 2.9% loss over the past five days.

Much of the sector's weakness was linked to a warning from investment bank Morgan Stanley (MS) earlier this week after it reduced its rating on Samsung Electronics (SSNLF) , the world's biggest chipmaker, to 'equal weight' from 'overweight' and cautioned that the memory chip sector's so-called "super cycle" is close to peaking, noting "downside risk as NAND prices have started to reverse" and "visibility on DRAM supply-demand dynamics has reduced" into next year.

Dutch semiconductor maker ASM International (ASMIY) shares were down 0.78%, changing hands at €57.21. Dialog Semiconductor (DLGNF) shares were marked 0.96% lower, trading at €36.75, extending a 5% loss over the past five days. Infineon Technologies (IFNNY) shares were down 0.32% at €23.15.

Chipmakers were under pressure in Asia, with Samsung Electronics down 3.4% and South Korea's SK Hynix, also one of the world's biggest chipmakers, fell 6.8%.

Micro Focus International plc (MFGP) the U.K.'s biggest listed tech company following the completion of HHewlett Packard Enterprise's (HPE) software business, shares were down 2.12% in London, changing hands at 2,445 pence, extending a 5% loss over the past month. Deutsche Bank this week downgraded the stock to 'hold' from 'buy', saying, "with limited upside potential to our price target, we believe the risk/ reward is now rather more balanced and downgrade to Hold."

More of What's Trending on TheStreet:

More from Technology

Blue Apron Stock Jumps 44% on Positive Earnings Guidance

Blue Apron Stock Jumps 44% on Positive Earnings Guidance

Netflix's Big Price Hike Could Add More Than $1 Billion to Its Annual Revenue

Netflix's Big Price Hike Could Add More Than $1 Billion to Its Annual Revenue

Netflix Raises U.S. Prices, May Need to Cut Them in Growth Markets

Netflix Raises U.S. Prices, May Need to Cut Them in Growth Markets

Airbnb Touts Two Straight Years of Profitability as It Gears Up for IPO

Airbnb Touts Two Straight Years of Profitability as It Gears Up for IPO

Micron Confirms It's Buying Out Intel in Flash Memory Joint Venture

Micron Confirms It's Buying Out Intel in Flash Memory Joint Venture