THE ECONOMY

Costco Wholesale Corp.’s fourth-quarter profit rose 30% as the largest U.S. warehouse club added small-business customers and shoppers sought bargains. Net income rose to $247.4 million, or 52 cents a share. Sales rose 10% to $12.1 billion.Juniper Networks Inc. had a wider third-quarter net loss on costs related to its July acquisition of Unisphere Networks Inc. The loss was $88.3 million, or 24 cents a share, compared with $29.7 million, or 9 cents, in the year-earlier quarter. Sales fell 25% to $152 million.