Airlines have already incurred costs over the need for new operating licences to continue flying in Britain and the European Union in the wake of Brexit.
Markets have been buoyed in recent months by the prospect of Republicans holding the Senate and provide a check on the Democrats but analysts said a "blue wave" scenario has spooked investors.
On December 24, Britain and the European Union agreed a post-Brexit deal that allayed the threat of disruption to business on January 1, when measures extending free trade are set to end.
China's market regulator in November issued draft antitrust guidelines for internet platform economies that highlighted examples of anti-competitive behaviour.
British Prime Minister Boris Johnson and EU chief Ursula von der Leyen had said after a crisis call that they would "go the extra mile" to find common ground.
Failure to secure a deal in time for the end of the transition period on December 31 would see Britain revert to World Trade Organization rules, with tariffs and quotas, from January 1.
The year has so far turned out to be a significant one for the online gaming industry in the United States. The sector won big during the just concluded polls where different states sought to legalize online sports betting within their borders.
The world of British real estate is at a crossroads. In one direction there are fantastic opportunities to bring about a very much healthier property scene and greatly to improve the built environment.