BOSTON--(BUSINESS WIRE)--Pioneer Investments today announced the dates and times for conference calls regarding its Closed-End Funds. The purpose of these calls is to discuss the performance of the funds year-to-date and their current positioning. The conference calls will be open to the public. The conference call schedule is as follows: Pioneer Floating Rate Trust (NYSE:PHD) and Pioneer Diversified High Income Trust (NYSE MKT: HNW). The call will be held on Tuesday, July 28, 2015 at 4:00 PM E