"T. Rowe Price Group has permanently banned about 1,300 American Airlines employees from trading among its funds in their 401(k) retirement plans, a rare move to curb 'collective' trading by subscribers to an investment newsletter. About 800 additional employees have received warning letters about their trading patterns ... An American Airlines spokesman said the company in its role as plan sponsor has acted appropriately. Despite the ban, all plan participants still can put new payroll deductions into T. Rowe Price's funds or cash out of them ... They cannot trade among the four T. Rowe Price funds in the plan, which has about 26 other investment choices."  MORE >>