Economic calendar: German ZEW index, US traders return to markets

• European stock markets set to open slightly lower

• US and Canadian traders return from holiday

• German ZEW index for September

European futures point to a slightly lower opening of today's cash session for major indices from the Old Continent. Traders from North America return to the markets today after a US and Canadian holiday yesterday. Having said that, liquidity is expected to pick-up and markets should be less prone to volatile moves. Nevertheless, as it is usually the case for US holidays on Mondays, economic releases for the remainder of the week were delayed by one day. As a result, there are no US data releases scheduled for today. API report on oil inventories will be released tomorrow as well. The only noteworthy print offered to investors today will be German ZEW data for September at 10:00 am BST.

8:00 am BST - Czech Republic, retail sales ex-autos for July. Expected: 5% YoY. Previous: 7.2% YoY

10:00 am BST - Euro area, GDP report for Q2 (third release). Second release: 2% QoQ

10:00 am BST - Germany, ZEW index for September.

• Current situation. Expected: 34.0. Previous: 29.3

• Expectations. Expected: 30.0. Previous: 40.4