LONDON (Reuters) - European shares crumbled on Friday, tracking a decline in U.S. stock futures after tech stocks Alphabet and Amazon missed results expectations, further sapping risk appetite as European earnings also disappointed with Valeo harshly punished.
The leading index of euro zone stocks <.STOXX50E> fell 1.5 percent with Germany's DAX <.GDAXI> down 1.7 percent and France's CAC 40 <.FCHI> down 1.8 percent.
Overall the third-quarter earnings season has been marred by rolling sell-offs across global markets and marked by sharp downgrades to earnings estimates.
Disappointing Amazon and Alphabet results reignited investors' anxieties about the overwhelming dominance of tech stocks - prized for seemingly unstoppable growth - in this market cycle.
The pan-European STOXX 600 was on track for its worst month since August 2015.
On the day earnings disappointments caused sharp falls.
Shares in French auto parts maker Valeo
Swedish appliances maker Electrolux
Shares in French household appliances maker SEB
Results from banks were more mixed after more encouraging results from UBS had boosted it in the previous session.
Spain's Banco Sabadell
(Reporting by Helen Reid; editing by Josephine Mason)