Chinese electric vehicle maker NIO Inc (HK:9866) rose sharply in Hong Kong trade on Tuesday after Macquarie upgraded the stock, citing improved expectations for the company’s upcoming earnings.

Asian currencies are at risk of further weakness amid recent strength in the dollar, especially if the upcoming U.S. elections result in a Republican sweep, JPMorgan analysts wrote in a recent note.

The S&P 500 is currently considered statistically expensive across 19 of 20 valuation metrics, indicating limited long-term price growth, Bank of America said in a Monday report.

Pfizer (NYSE:PFE)'s quarterly financial report on Tuesday comes at a critical moment for the U.S. drugmaker and its CEO, as activist hedge fund Starboard Value ramps up the pressure to demonstrate concrete results of a promised turnaround.

The U.S. dollar steadied Monday, on course for a hefty monthly gain, while the euro was steady at the start of an action-packed week.

Europe's major airlines including Lufthansa and Air France-KLM are expected to report another quarter dragged down by rising costs and limited planes, with no sign of delivery delays from planemakers Boeing (NYSE:BA) and Airbus improving any time soon.