"There will also be a lot of interest in the outlook for Apple, with the current share price reflecting the pessimism surrounding the company, compared to last year, " said Alpari's Erlam.

NPR: Chinese Stocks Underperform On Growth Concerns

Wood argues, however, that a big chunk of Boeing's seven-year backlog would need to evaporate quickly for the market's fears--and Boeing's current price--to be justified.

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