July 25 (Bloomberg) -- U.S. stock-index futures rose after profits that topped analysts' estimates at Boeing Co. and Amazon.com Inc. helped assuage concerns that sent equities to their worst drop in four months yesterday.

Amazon.com, the world's biggest online retailer, rallied on earnings that nearly tripled because of curbed technology spending. Boeing, the second-largest commercial-jet maker, gained after it said it delivered on record aircraft orders.

Better-than-expected profit gains at Colgate-Palmolive Co. and Xerox Corp. also helped stocks rebound from a tumble sparked by evidence the housing crisis is spreading. Earnings growth has averaged 9.6 percent for the 199 Standard & Poor's 500 Index members that posted results as of yesterday, beating the 5.8 percent predicted by analysts in a Bloomberg survey.

``The quality of earnings is fine,'' said James Bevan, who helps manage about $9 billion as chief investment officer at CCLA Investment Management Ltd. in London. ``There are still companies coming to the table with very respectable results. This is not the time for the equity market to panic over subprime concerns.''

S&P 500 futures expiring in September increased 6.8 to 1529.3 as of 9:09 a.m. in New York. Dow Jones Industrial Average futures added 64 to 13,877. Nasdaq-100 Index futures gained 7.5 to 2033.

Amazon.com, Boeing

Amazon.com jumped $15.41, or 22 percent, to $84.66. Second- quarter net income rose to $78 million, or 19 cents a share, from $22 million, or 5 cents, a year earlier. The results beat analysts' estimates by 3 cents.

Earnings at Amazon.com may rise through 2011 on the back of wider profit margins, analysts including Anthony Noto at Goldman, Sachs & Co. wrote in a report to clients today. The company has reported three consecutive quarters with expanding margins for the first time since 2002, they said, and boosted their price estimate for the stock by 65 percent to $91.

Credit Suisse Group today raised its recommendation on Amazon.com's shares to ``outperform'' from ``neutral.'' Deutsche Bank AG increased its price projection for the stock 25 percent to $100.

Boeing Co. added $2.80 to $106.60. The Chicago-based company earned $1.35 a share in the second quarter, above the $1.16 expected by analysts in a Bloomberg survey.

Colgate, Xerox

Colgate-Palmolive Co., the world's largest maker of toothpaste, rose $1 to $69.25. Profit excluding some costs was 84 cents in the quarter. That's more than the 83-cent average estimate of analysts surveyed by Bloomberg.

Xerox Corp. gained 29 cents to $19.62. The world's largest maker of high-speed color-printing devices earned 28 cents a share in the second quarter, beating analysts' estimates by a penny. The company also raised its full-year profit forecast to $1.16 to $1.18 a share, from $1.12 to $1.16.

U.S. stocks slumped yesterday the most since March after Countrywide Financial Corp., which accounts for almost a fifth of U.S. mortgages, reported second-quarter net income tumbled 33 percent. ``Difficult'' conditions caused by subprime mortgage defaults may persist, the company said. The results prompted concern the housing crisis is spreading.

A report today may show that sales of previously owned homes fell for a fourth straight month in June. Purchases probably declined 2.1 percent to an annual rate of 5.86 million, from 5.99 million the prior month, according to the median estimate in a Bloomberg survey of economists. The National Association of Realtors report is due at 10 a.m. in Washington.

Corning Inc. dropped $1.24, or 4.7 percent, to $24.95. The largest producer of fiber optic cable used in telecommunications networks said second-quarter sales were $1.42 billion, missing the average sales estimate of $1.44 billion from analysts polled by Bloomberg.

To contact the reporters on this story: Jakob Lindstroem in Stockholm at jlindstroem@bloomberg.net; Lynn Thomasson in New York at lthomasson@bloomberg.net.

Last Updated: July 25, 2007 09:09 EDT