This story has been updated to reflect that U.S. oil futures settled at $30.44 a barrel. A previous version of this story misstated the closing figure.
This story has been updated to reflect that the Canadian dollar hit its lowest levels since May 2003.
An earlier version misstated the Powerball states that do not collect state income tax on the winnings.
Reuters updated the story to reflect that Han is the deputy director of the office of the Chinese Communist Party's Leading Group on Financial and Economic Affairs.
Correction: An earlier version of this story mispriced the CoDrone.
The story has been updated to clarify the correct details of Uber's valuation and financing.
The CEO of the Buzzoto Group is Toby Buzzuto.
This article has been updated to reflect that Thursday's yuan fixing was the lowest since 2011.
Correction: This story has been updated to reflect the accurate size of Saudi Arabia's foreign exchange reserves.
Correction: This story has been updated to reflect the Chinese yuan weakened, not strengthened, against the U.S. dollar.