This story has been updated to delete an incorrect description of the LaFerrari's engine.
This story has been updated to reflect that Homeaway only sued Airbnb in San Francisco.
This story has been updated to reflect that the hotel operator that was downgraded by Deutsche Bank was Wyndham.
This version has been updated to attribute the remarks about Athens weaning itself off debt to Yanis Varoufakis.
This version deleted an incorrect description of Gigya as a data broker.
The story has been updated to correct the peak price of gold earlier in January.
This story has been updated to correct the name of the company PayForward.
An earlier version misstated the number of Apple stores in China. Apple's website lists 15.
An earlier version of this story misidentified the source of the survey, and Ryan Bailey's work affiliation. Both are associated with TD Bank.
This version corrected the performance of the PIMCO Mint fund and other ETFs mentioned in this article.