Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 30; Flight Crew Total 21000; Flight Crew Type 1500
Time Pressure; Situational Awareness
Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Flight Crew Took Evasive Action
Human Factors
Traffic was exchanged by ZZZ Approach between myself; at 6;500 feet; and a RJ at 6;000 feet. Soon after I did get the traffic in sight; at my right front and 500 feet below. The RJ suddenly reported an RA and 'climbing'. I observed the traffic pitch upward. I began a left turn to avoid. The Controller firmly questioned the actions of the RJ numerous times. As I began a descent; I observed the RJ suddenly pitch downward.  I stopped my descent. Traffic passed ahead of me at less than a mile and maybe 200 ft. below.  Controller questioned me about the incident. Appears that the RA was incorrectly interpreted.
PA32 pilot reported an RA event that required evasive action.