1. Facebook takes a hit

Shares in Facebook (FB, Tech30) are falling by about 7% premarket after CFO David Wehner spooked investors yesterday by warning that sales growth was expected to slow in 2017.

Sales hit a new record in the third quarter, but Wehner's comments indicate the boom may be ending.

Facebook's remarkable sales growth has been fueled by its success in selling ads on smartphones and tablets. Mobile ads now account for 84% of overall ad revenue, compared to almost nothing in mid-2012.

Another tech company that's set to take a big fall Thursday is Fitbit (FIT). The wearable device maker's stock is down by about 30% in extended trading following a disappointing earnings report.

2. Fed to raise rates in December?

The Federal Reserve kept interest rates unchanged on Wednesday in its last policy decision before the U.S. election, but signaled it could hike in December as the economy gathers momentum and inflation picks up.

The U.S. central bank said the economy had gained steam and job gains remained solid. Policymakers also expressed more optimism that inflation was moving toward their 2 percent target.

3. Bank of England day

The Bank of England is set to issue a decision on interest rates Thursday, though market watchers are expecting the central bank will hold rates steady.

If that's the case, it will be at least the fourth major central bank in a week to hold rates, following the Federal Reserve, Bank of Japan and Reserve Bank of Australia.

Additionally, the U.K. High Court is expected to rule Thursday on whether members of parliament can have a say in Britain's plans to leave the European Union. The decision could throw the Brexit process into confusion.

4. Economics and earnings

Many of the elements that feed into the U.S. GDP report will pop up this morning, including reports on factory orders and worker productivity.

The European Union is also publishing its autumn economic forecast Thursday along with releasing new data on September unemployment levels.

Coming later this week:

Thursday - Bank of England's rate decision, CBS (CBS) and Starbucks (SBUX) earnings

Friday – NFP Jobs report, Adidas (ADDDF) earnings, International trade report

Adidas (ADDYY), Avon Products (AVP), Chesapeake Energy (CHK), Hyatt Hotels (H) and Time (TIME) are some of the key companies releasing earnings before the opening bell.

Shares in Adidas are falling by about 4% in Europe as investors express their disappointment with the results.

Coming up, CBS (CBS), Kraft Heinz (KHC), Starbucks (SBUX), Weight Watchers (WTW), GoPro (GPRO, Tech30), FireEye (FEYE) and Fossil (FOSL) are set to release their earnings after the close.

And shares in Wynn Resorts (WYNN) are dropping premarket after the company reported earnings that missed Wall Street estimates.