NEW YORK — Stocks that traded heavily or had substantial price changes on Thursday:
Costco Wholesale Corp., down $37.72 to $846.59.
The warehouse club operator is raising its membership fees for the first time in seven years.
Citigroup Inc., down $1.27 to $65.71.
Government regulators slapped the bank with a $135.6 million fine, citing insufficient progress in resolving internal control and risk issues.
Delta Air Lines Inc., down $1.87 to $44.99.