Big-box Retail companies shares up at 10 a.m.

Shares of some top big-box retail companies are up at 10 a.m.:

Costco Wholesale Corp. rose $.07 or percent, to $147.05.

Target rose $.61 or .7 percent, to $81.95.

Wal-Mart Stores Inc. rose $.36 or .5 percent, to $78.79.