Financial Industry Regulatory Authority, Inc. (“FINRA”) is filing with the Securities and Exchange Commission (“SEC” or “Commission”) a proposed rule change to amend FINRA Rule 6121.02 (Market-wide Circuit Breakers in NMS Stocks) concerning the resumption of trading following a Level 3 market-wide circuit breaker halt in connection with the industry’s expansion of trading hours to 23 hours per day, 5 days per week.