Shares of

Giant Industries

(GI)

were among the

NYSE's

winners Monday, climbing 14% after the oil refiner agreed to be acquired by

Western Refining

(WNR)

for $1.2 billion.

Western will pay $83 a share in cash, a premium of 16% over Giant's Friday closing price of $71.79. The purchase, which also will include the assumption of $275 million in debt, will make Western the fourth-largest publicly traded independent refiner and marketer in the U.S.

"With Giant, we will significantly increase our capacity in fast-growing, high-demand areas and gain an immediate footprint in new, complementary businesses," Western said. The transaction will be funded by about $250 million in cash on hand and a $2 billion loan package from Bank of America. The deal is expected to close in the fourth quarter. Shares of Giant recently were trading up $9.90 to $81.69, while shares of Western fell 29 cents to $25.70.

Kinder Morgan

(KMI) - Get Report

rose 2% after the company agreed to be acquired for $15 billion, or $107.50 a share, by a group of investors that includes Kinder Morgan's CEO and its co-founder. The all-cash deal represents a 6% premium over Friday's closing price of $101.70 and a 27% premium over the company's closing price of $84.41 on May 26, which was the last trading day before the group of investors first announced its proposal to take the company public. The private equity firms also will assume about $7 billion in debt. The deal is expected to be completed by early 2007. Shares were up $2.50 to $104.20.

Amazon.com

(AMZN) - Get Report

rose 3% after the Internet retailer announced a $500 million stock buyback plan. Shares will be purchased over the next 24 months. "The program allows the company to opportunistically repurchase its shares," Amazon said. "The company may do so if it believes its shares are undervalued." Shares recently changed hands at $28.79, up 76 cents.

Shares of

Charming Shoppes

(CHRS) - Get Report

jumped 8% after Standard & Poor's said it plans to add the retailer to its S&P MidCap 400 index after the close of trading Monday. Charming Shoppes will replace

Gtech Holdings

( GTK), which is being acquired by Lottomatica. Shares of Charming Shoppes were adding $1 to $12.84.

Wal-Mart

(WMT) - Get Report

shares rose 1% after the retailer said August same-store sales rose 2.7%, at the high end of its previous guidance. Previously, the company forecast a gain of 1% to 3%. In July, Wal-Mart's same-store sales rose 2.4%. Shares were trading up 61 cents to $44.49.

U.S. Steel

(X) - Get Report

fell 2% after Prudential downgraded shares of the company to underweight from neutral. The firm also reduced its price target to $50 from $65. Prudential cited near-term steel industry oversupply concerns for its downgrade. Shares were trading down $1.42 to $58.26.

Shares of

Brown-Forman

(BFB)

fell modestly after the liquor and beer company announced an agreement to buy a Mexican tequila business. Brown-Forman will buy most of the assets of Grupo Industrial Herradura for $876 million. The purchase includes the Herradura and El Jimador tequilas and the New Mix tequila-based ready-to-drink brand.

"While Brown-Forman has had a variety of interests in Mexico for many years, the acquisition of Casa Herradura is our most significant investment in the country and will enable us to continue our company's international expansion," the company said. Brown-Forman expects the deal to add 8 cents to 12 cents a share to fiscal 2007 earnings. Shares recently were trading at $73.45, down 61 cents.

NYSE volume leaders Monday include

Lucent Technologies

( LU), up 5 cents to $2.28;

Ford

(F) - Get Report

, up 3 cents to $8.03;

Exxon Mobil

(XOM) - Get Report

, down 30 cents to $70.13;

DirecTV

(DTV)

, down 2 cents to $18.61;

Pfizer

(PFE) - Get Report

, up 17 cents to $27.40;

Nortel Networks

( NT), up 3 cents to $2.15; Advanced Micro Devices, up 11 cents to $24.67; and

Wyeth

( WYE), up 62 cents to $48.28.

Nasdaq

volume leaders included

Intel

(INTC) - Get Report

, up 31 cents to $19.21;

Sun Microsystems

(SUNW) - Get Report

, up 10 cents to $4.95;

JDSU

(JDSU)

, up 8 cents to $2.66;

Apple

(AAPL) - Get Report

, down 71 cents to $68.04;

Microsoft

(MSFT) - Get Report

, unchanged at $25.85;

eBay

(EBAY) - Get Report

, up 63 cents to $25.93;

Avanex

( AVNX), up 30 cents to $1.94; and

Dell

(DELL) - Get Report

, up 50 cents to $22.26.