U.K. stocks slipped Monday, hampered by ongoing questions about the political landscape in Britain after the Conservative Party lost its parliamentary majority last week.

The Nasdaq Composite suffered its worst two-session clobbering on a point basis since September, raising questions about what has sparked a sudden selloff in tech, which has been at the heart of Wall Street's bull run in equities in recent months.

Stocks started Tuesday on stronger footing in Asia after a U.S.-led decline Monday. Wall Street stocks overnight dropped again as technology shares continued to underperform, though the sector's losses were less severe than on Friday. Investors are looking to this week's monetary-policy meeting in the U.S., where another interest-rate increase is anticipated.