This version corrected Boehner's party affiliation.
This version corrected the year of stationary fuel cell revenue growth.
This version corrected Mitch McConnell's title to Senate Minority Leader.
This version corrected Bank of America's ticker symbol.
This story has been corrected to reflect that Amazon plans to hire 40 percent more seasonal workers, and its second-quarter earnings fell short of Wall Street expectations in July.
This story has been updated throughout to reflect this year's sales forecast.
This version deleted an incorrect reference made by a conference participant that about 10 percent of Blackstone investors are African. A Blackstone spokeswoman said "much less than 10 percent" of its investors are African.
This story has been updated to reflect accurate estimates for Twitter's revenue.
This story has been changed to reflect that Timothy Ash is head of emerging market research at Standard Bank.
Oracle's second-quarter earnings forecast has been updated to reflect the impact of a 1-cent gain from currency exchange rates, which analysts also consider in compiling their estimates.