PARIS (Reuters) - Europe's main stock markets are trading on a cautious note on Monday morning in the face of an uncertain economic outlook, between the beneficial effect of China's reopening and the restrictive impact on activity of central bank monetary tightening.

In Paris, the CAC 40 was virtually unchanged at 6,994.39 points at around 08:45 GMT. In London, the FTSE 100 gained 0.11% and in Frankfurt, the Dax gained 0.05%.

At the end of last week, optimism surrounding the reopening of China and the start of the corporate earnings season meant that worries about the economic outlook and ongoing monetary tightening by central banks took a back seat.

But these fears are still very much alive, particularly in Europe, following Sunday's statements by ECB Governing Council member Klaas Knot, who advocated raising interest rates by 50 basis points in February and March.

This pushed the euro to a nine-month high against the dollar.

Despite this, the technology sector (+1%), whose valuation is sensitive to interest rate trends, posted the strongest sectoral rise in Europe, a sign of investors' growing optimism about the economic situation.

The chemicals sector (-0.8%) was hit by the 7% fall of Germany's Symrise, which reported a lower-than-expected Ebitda margin for 2022.

In Paris, Atos climbed 3.8%, boosted by reports in the Journal du Dimanche that the French group Astek had expressed interest in buying the future separate entity Evidian, which will include Atos' coveted Big Data and Security (BDS) division.

(Written by Blandine Hénault, edited by Tangi Salaün)