Economic calendar: Powell's speech in the spotlight

• European indices set for slightly lower opening

• Fed Powell and ECB Lagarde to deliver speeches today

European stock market indices are set for a slightly lower opening today. This is a response to a downbeat trading on Wall Street yesterday and in Asia-Pacific earlier today. 

Jackson Hole Economic Symposium is the main event of the day. While it was launched yesterday, key speeches will be delivered today. Those include a speech from Fed Chair Powell at 3:05 pm BST and speech from ECB President Lagarde at 8:00 pm BST. 

When it comes to economic releases, traders will be offered German IFO index for August at 9:00 am BST as well as a revision of University of Michigan index for August. Speaking of revisions. Revised German Q2 GDP report was released today at 7:00 am BST but it offered no surprises. On a quarterly basis, stagnation was confirmed (0.0% QoQ). On an annual basis, the German economy contracted 0.6%.

9:00 am BST - Germany, IFO index for August. Expected: 86.7. Previous: 87.3

3:00 pm BST - US, University of Michigan index for August (final). First release: 71.2

Central bankers' speeches

• 3:05 pm BST - Fed Chair Powell
• 4:00 pm BST - Fed Harker
• 4:30 pm BST - Fed Harker
• 4:30 pm BST - Fed Mester
• 5:30 pm BST - Fed Goolsbee
• 7:00 pm BST - Fed Goolsbee
• 7:30 pm BST - Fed Mester
• 8:00 pm BST - ECB President Lagarde