Updated from 1:22 p.m. EDT

A host of retail chain stores reported monthly sales results for May Thursday, with many names, especially discount retailers, posting strong numbers.

Wal-Mart

(WMT) - Get Report

, the world's biggest store operator, said same-store sales climbed 3.9% in May, excluding fuel sales, total sales advanced 9.8% to $31.04 billion. The discount operator believes some of sales strength is due to the recent release of federal stimulus checks.

Looking forward, the discount retailer expects same-store sales of 2% to 4% in June. The stock was trading up 3.4%.

Warehouse retailer

Costco

(COST) - Get Report

reported net sales of $5.77 billion, up 12% from the same period last year. Same-store sales rose 9% in May. Costco shares were up 3.5%.

BJ's Wholesale Club

(BJ) - Get Report

reported a same-store sales rise of 13.4% in May, including a contribution from sales of gasoline worth 6.6%. Total May sales increased 15.9% to $824.3 million. The stock edged down 0.3%.

Target

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, however, said last month's comparable sales eased 0.7%. Net sales for the month increased 5.5% to $4.56 billion. The stock traded up 1.1% after an earlier slide.

J.C. Penney

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reported comparable-store sales decreased 4.4% in May, vs. a 0.9% decrease a year ago. Total sales in May decreased 2.4% to $1.3 billion. Looking forward, the department store retailer expects a mid-single digit decrease in June same-store sales, compared to a 0.7% decrease in last year's June period. Shares were up 3%.

Fellow department store chain

Kohl's

(KSS) - Get Report

posted 7.2% decline in May same-store sales over last year, but total sales rose 1.2% to $1.21 billion. The stock rose 3.6%.

Teen retailer

Hot Topic

( HOTT) posted a 0.2% drop in May store sales, vs. a 6.1% drop in May 2007. Total sales rose 5% to $47.4 million. The stock, which received an upgrade from Friedman Billings of market perform to outperform this morning, was climbing 18%.

Fellow teen-apparel retailer

Aeropostale

(ARO)

said same-store sales in May increased 6%, compared to a 2% rise in the same period a year ago. The stock was roughly flat in recent trading Thursday.

On the other hand,

American Eagle

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posted a 9% drop in May same-store sales, compared to a 5% increase in May last year. Shares, however, were up 1.5%.

Clothing retailer

Gap's

(GPS) - Get Report

same-store sales dropped 14%, compared to a 3% drop in May of last year. Net sales came to $1.09 billion, down 8% from May of last year. The stock, however, edged up 0.2%.

Limited

(LTD)

, which operates such brands as Victoria's Secret and Bath & Body Works, reported comps were 6% below the same month in 2007. The stock declined was roughly flat.

This article was written by a staff member of TheStreet.com.