The first customers to walk out of Australia's flagship Apple store with the new iPhone 7 react for the press in Sydney. REUTERS/Jason Reed

A screen displays stock charts while a trader works at his post on the floor at the New York Stock Exchange, May 30, 2013. REUTERS/Brendan McDermid

Ayano Tominaga holds a cushion printed a portrait of Apple co-founder Steve Jobs on it, as she sits in queue for the release of Apple's new iPhone 7 and 7 Plus in front of the Apple Store in Tokyo's Omotesando shopping district, Japan. REUTERS/Issei Kato

Jaime Gonzalez (C) celebrates with Apple workers after buying the iPhone 7 smartphone outside an Apple Inc. store in New York, U.S., September 16, 2016. REUTERS/Eduardo Munoz

A customer exits the Apple Inc. store during the sale of the new iPhone 7 smartphone in New York, U.S., September 16, 2016. REUTERS/Eduardo Munoz

Floor governor Peter Giacchi (R) gives a price for Noble Midstream Partners LP, during the company's IPO on the floor of the New York Stock Exchange (NYSE) in New York City, U.S., September 15, 2016. REUTERS/Brendan McDermid

A man poses for a selfie as he looks at a new iPhone 7 smartphone inside of an Apple Inc. store in New York, U.S., September 16, 2016. REUTERS/Eduardo Munoz

A customer falls down before going into the Apple store to buy the iPhone 7 in New York. REUTERS/Eduardo Munoz