Changes in profitability especially ones that exceed or fall short of expectations are what drive stock returns.
DuPont and Radio Shack are the latest companies to fall short of expectations and dive lower.
In January, Manganese Bronze had to issue a profit warning, saying that it had made no profit in 2011 and could fall short of expectations this year.
Shares of micro-controller manufacturer Microchip Technology are down sharply in late trading after the company warned that sales for its fiscal first quarter ending June 30 will fall short of expectations.
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On the marketing front, iPhone 5 would have to fall short of expectations in a significant way to become anything other than a smash hit: There are tens of millions of iPhone users worldwide.
The Bank of England left rates unchanged this month, but with fears growing that economic expansion will fall short of expectations, it may soon have to choose between fighting inflation and staving off Britain's first recession in over a decade.
If ratings fall short of advertiser expectations, Fox will likely have to issue make good ads.
Q4 sales jump 22% on the strength of its e-book business, but earnings and 2013 outlook fall short of analyst expectations.
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Although the exact reason for the drawback is not known yet, Harman's fourth quarter and full year results did fall short of Wall Street's expectations.
Prices factored in expectations that outstanding values would decline and the bonds' weighted average lifetimes would fall short of their official maturity dates.
Recognizing that it might fall short of some pledges, the Beijing Organizing Committee, known as Bocog, has lately been working to damp expectations.
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