NEW YORK — Wal-Mart Stores Inc. reported a 5.7 percent increase in second-quarter net income and raised its outlook for the full year as the world's largest retailer continues to woo back frugal shoppers by re-emphasizing it has the lowest prices on everything from clothes to electronics.

But Wal-Mart is seeing its momentum slow down amid a tough economic climate here and abroad. Its total revenue came in short of Wall Street estimates, and the discounter is delaying store expansion plans in Mexico, its largest international division, as it deals with bribery charges there. It's also scaling back store growth plans in China and Brazil to boost profitability in those operations.

Investors, who had sent the stock up 25 percent since mid-May, pushed shares down more than 3 percent on the news.

Wal-Mart is considered an economic bellwether because the retailer accounts nearly 10 percent of nonautomotive retail spending in the U.S. The company, based in Bentonville, Ark., said its customers are still being squeezed by economic problems in the U.S. and abroad. In the U.S., Wal-Mart's low-income shoppers are still having trouble stretching their dollars to the next payday, and that financial duress escalated overseas in the latest quarter. The company said what's helped it is a focus on low prices.

"I don't think the economy is helping us," Charles Holley, Wal-Mart's chief financial officer told reporters during a conference call. "Our customer is still very concerned about employment."

Still, Wal-Mart's results offer optimism that the company's namesake U.S. business has turned a corner. Wal-Mart, which thrived during the U.S. recession as more well-off people started shopping at its stores here, had begun to struggle as the retailer's core low-income customers were hit hard by joblessness and other challenges in a slow economic recovery.

Adding to that, Wal-Mart's U.S. stores, which account for 60 percent of the company's revenue, had turned off shoppers by veering away from its "everyday low prices" strategy and focusing more on temporarily slashing prices on select items. It also got rid of popular merchandise in an effort to de-clutter the stores.

Wal-Mart last year began adding back 10,000 products and refocused on keeping prices low throughout the store, backing the strategy with TV campaigns. It has done that by cutting expenses and passing some of the savings on to customers. As a result, revenue at Wal-Mart's U.S. division rose 3.8 percent to $67.35 billion in the latest quarter.

Revenue at stores open at least a year – considered a key measure of a retailer's health because it excludes the impact from stores that open and close during the year – rose 2.2 percent in the division, excluding fuel. The figure, which was slightly above the 2.1 percent Wall Street estimate, marks the fourth consecutive quarterly gain for the division after it experienced nine straight quarters of declines. However, the pace was slower than the 2.6 percent gain in the company's first quarter.

Customer traffic increased for the third straight quarter, too. The 0.4 percent increase translated to serving another 80,000 additional customers every day during the latest quarter, the company said. It still trailed the 1.1 percent pace in the previous period.

Wal-Mart enjoyed sales gains in nearly every merchandise category except for consumer electronics, which continues to post declines because of deflationary pressures in gadgets. Wal-Mart's return to clothing basics like underwear, jeans and socks continues to pay off. So far this season, key back-to-school clothing categories have enjoyed a 7 percent sales increase.

For the overall U.S. business, revenue at stores opened at least a year rose 2.5 percent, including a 4.7 percent increase at the company Sam's Club warehouses.

Wal-Mart's international business, which produces more than a quarter of its revenue, has remained strong. The company's international sector increased 6.4 percent to $32.01 billion in the quarter. Even in the United Kingdom, which is struggling with a weak economy, Wal-Mart has seen shoppers flocking to its stores because of its low prices. "The customer is very stretched there," said Holley.

But it's scaling back expansion plans in three markets: China, Brazil and Mexico.

"International remains our growth engine, but at a slightly slower pace," said Mike Duke, Wal-Mart's president and CEO.

Wal-Mart is slowing store expansion in China and Brazil to focus on getting the best store sites and fine tuning its every day low price strategy.

In Mexico, Wal-Mart said it's delaying the expansion of some of its stores in Mexico by as much as 90 days. The delay, the company said, is due to additional steps its Mexico division is taking in the real estate process. These steps include reinforcing documentation that backs real estate projects. In addition, some stores that are set to open in Mexico the latter half of December have been moved into January 2013 to allow its operations team to focus on the Christmas season.

The delay in Mexico come four months after reports surfaced that the retailer allegedly failed to notify law enforcement after finding evidence that officials authorized millions of dollars in bribes in Mexico to speed building permits and gain other favors. The company has said it has launched its own internal investigation into the bribery matter and is working with government officials in the U.S. and Mexico. Wal-Mart has also been overhauling its compliance program.

Wal-Mart said that it had incurred $34 million in expenses related to the bribery investigation, and expects to incur $35 million to $40 million in expenses during each of the remaining quarters of the year.

In the latest blow, two U.S. congressmen who are doing their own investigation – Reps. Henry Waxman and Elijah Cummings – made public this week letters to Wal-Mart's CEO Mike Duke suggesting the company may have had problems with money laundering and tax evasion. Walmex, Wal-Mart's Mexico division, said in a statement that "it has no knowledge that (it) is being investigated by Mexican authorities concerning these issues."

Overall, Wal-Mart reported net income of $4.02 billion, or $1.19 per share, for the quarter ended July 31. That compares with $3.80 billion, or $1.09 per share, a year ago. Revenue excluding membership fees at Sam's Club rose 4.5 percent to $113.53 billion. Analysts forecast $1.17 per share on revenue of $114.63 billion.

It expects third-quarter net income between $1.04 per share and $1.09 per share. Analysts had expected $1.05. For the full year, it now forecasts earnings per share to be in the range of $4.83 to $4.93. That is up from Wal-Mart's original forecast of $4.72 to $4.92 per share. Analysts forecast $4.93.

Shares fell $2.30 to close at $72.15 Thursday. Investors, who pushed Wal-Mart's stock down right after the allegations surfaced in late April, had sent shares up 25 percent since mid-May.

Here are some of the hottest retailers:
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  • 10. Overstock.com

    <strong>Sales growth in '10 vs. '09:</strong> 23.8 percent <strong>Retail sales in the U.S.:</strong> $1.07 billion <strong>Number of stores in 2010:</strong> N.A. <strong>Stores growth in '10 vs. '09:</strong> N.A. This year, the online retailer started selling discounted hotel rooms, and is considering offering deals on auto and home insurance. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 9. H&M

    <strong>Sales growth in '10 vs. '09:</strong> 29.3 percent <strong>Retail sales in the U.S.:</strong> $1.2 billion <strong>Number of stores in 2010:</strong> 208 <strong>Stores growth in '10 vs. '09:</strong> 10.1 percent Although only 10 percent of its worldwide stores are located in the U.S., the clothing retailer is rapidly growing. H&M; plans to have a running website to sell to American shoppers by the end of this year. Well-regarded designers like Donatella Versace also sell affordable collections at the store during certain seasons. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 8. Netflix

    <strong>Sales growth in '10 vs. '09:</strong> 29.5 percent <strong>Retail sales in the U.S.:</strong> $2.1 billion <strong>Number of stores in 2010:</strong> N.A. <strong>Stores growth in '10 vs. '09:</strong> N.A. Despite price increases for subscribers, Netflix has presented itself as the far superior option to renting DVDs by mail or watching streaming content online (and people are talking with their wallets, here). Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 7. Apple Stores/iTunes

    <strong>Sales growth in '10 vs. '09:</strong> 32.3 percent <strong>Retail sales in the U.S.:</strong> $18 billion <strong>Number of stores in 2010:</strong> 233 <strong>Stores growth in '10 vs. '09:</strong> 7.4 percent Think about which products have excited consumers in the past few years, and you will think of Apple: the iPhone, the iPad, and the soon to be debuted the iCloud. The typical Apple store also generates $4,046 of revenue per square feet, compared to $880 that Best Buy brings in. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 6. Bodega Latina

    <strong>Sales growth in '10 vs. '09:</strong> 32.5 percent <strong>Retail sales in the U.S.:</strong> $722 million <strong>Number of stores in 2010:</strong> 34 <strong>Stores growth in '10 vs. '09:</strong> 61.9 percent The rapidly growing Latino market has boosted sales for the grocery chain, which has seen the the most growth in areas like Southern California, Texas, and South Florida. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 5. Tops Friendly Markets

    <strong>Sales growth in '10 vs. '09:</strong> 33.1 percent <strong>Retail sales in the U.S.:</strong> $2.2 billion <strong>Number of stores in 2010:</strong> 133 <strong>Stores growth in '10 vs. '09:</strong> 77.3 percent After being downsized in the early 2000s, Tops Friendly Markets recently won a bankruptcy court battle to take over 79 supermarkets, and is making waves in the convenience store business. This summer, Top opened a remodeled store and an on-site fueling station in upstate New York. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 4. hhgregg

    <strong>Sales growth in '10 vs. '09:</strong> 36.3 percent <strong>Retail sales in the U.S.:</strong> $2.1 billion <strong>Number of stores in 2010:</strong> 173 <strong>Stores growth in '10 vs. '09:</strong> 32.1 percent The consonant-heavy sounding store name founded by Henry Harold and Fansy Gregg opened its first 10 stores in South Florida with more planned. It passed $2 billion in sales for the first time last year. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 3. Fresh & Easy Neighborhood Market

    <strong>Sales growth in '10 vs. '09:</strong> 37.8 percent <strong>Retail sales in the U.S.:</strong> $766 million <strong>Number of stores in 2010:</strong> 164 <strong>Stores growth in '10 vs. '09:</strong> 13.1 percent Although it initially lost money after opening its first store four years ago, Fresh & Easy is expanding in Southern California, Phoenix and Las Vegas, and just opened two stores in San Francisco. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 2. Amazon.com

    <strong>Sales growth in '10 vs. '09:</strong> 46.2 percent <strong>Retail sales in the U.S.:</strong> $18.5 billion <strong>Number of stores in 2010:</strong> N.A. <strong>Stores growth in '10 vs. '09:</strong> N.A. Online bargains have always been available on Amazon.com and consumers have flocked to the retailer to find deals. In addition, Amazon saw major sales growth after it bought Zappos.com, a highly celebrated retailer known for its stellar customer service. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.

  • 1. Ascena Retail Group (formerly Dress Barn)

    <strong>Sales growth in '10 vs. '09:</strong> 58.9 percent <strong>Retail sales in the U.S.:</strong> $2.3 billion <strong>Number of stores in 2010:</strong> 2,477 <strong>Stores growth in '10 vs. '09:</strong> 58.9 percent Who would have thought Dress Barn would rank at the top of the 100 hottest retailers? The retail group has focused on targeting specific demographics to produce profits. The Ascena Retail Group's Dress Barn targets the 35- to 55-year-old woman. It's Maurices chain targets 17- to 34-year-olds, and another chain Justice's targets 7- to 14-year-old customers. Ascena has been able to target specific segments of the consumer base, and has seen real success. Read more at <a href="http://bundle.com" target="_hplink">bundle.com</a>.