By Andrea Tse, TheStreet

Amazon (AMZN) was falling Wednesday after the online retailer reported disappointing third-quarter results Tuesday.

Amazon posted earnings of $63 million, or 14 cents a share, on sales of $10.88 billion. The average estimate was for earnings of 24 cents on revenue of $10.95 billion. For the fourth quarter, Amazon said it could post an operating loss of as much $200 million or a profit of as much as $250 million with sales ranging from $16.45 billion to $18.65 billion. Analysts had expected net income of about $394 million, or 85 cents, on sales of $18.15 billion.

Sprint(S), the No. 3 wireless service provider, posted a third-quarter loss of $301 million, or 10 cents a share, narrowing the previous year's loss. Revenue rose 2% to $8.33 billion. Analysts expected a loss of 22 cents a share on revenue of $8.38 billion. Sprint said the "iPhone is expected to be accretive for Sprint, and iPhone users are expected to be among Sprint's most profitable customers."

Aerospace giant Boeing (BA) raised its full-year earnings forecast to between $4.30 and $4.40 a share after reporting third-quarter earnings of $1.46 per share, which beat the average analyst estimate of $1.10 a share.

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ConocoPhillips (COP) reported third-quarter adjusted earnings of $2.52 a share, beating the Wall Street target of $2.18 a share.

Ford (F) said its third-quarter net income fell by $38 million year over year to $1.6 billion, or 41 cents a share. Adjusted profit came in at 46 cents a share, beating the average analyst estimate of 44 cents. The company didn't say when it might reinstitute a dividend.

WellPoint (WLP), the largest health insurer based on membership, said its third-quarter net income was $683.2 million, or $1.90 a share, including net investment gains of 13 cents. A year earlier, net income was $739.1 million, or $1.84 a share, including net investment gains of 10 cents. The company reported adjusted net income of $1.77 a share, topping analysts' estimates, as it added 169,000 members in the quarter.

Business software maker SAP (SAP) said net profit jumped to 1.25 billion euros ($1.7 billion) in the third quarter as the company reduced the amount of money set aside for a possible judgment against it in a lawsuit brought by Oracle (ORCL).

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In other company news, Nokia (NOK) unveiled its first Windows-based smartphones, the Nokia Lumia 800 and Lumia 710.

IBM's (IBM) popular CEO Sam Palmisano plans to step down at the end of 2011. The Dow component said Tuesday he'll be replaced by the company's sales chief, Virginia Rometty.