Details of their proposals will be set out in rule filings and amendments subject to SEC approval
IIROC will continue to harmonize with the new U.S. market-wide safety valves
Proposed changes would mesh with U.S. reforms
Firms get more time to respond to Knight Capital trading glitch
The new “limit up-limit down mechanism” will replace the existing single-stock circuit breakers
The new circuit breakers will initially apply to all securities included in the S&P/TSX composite index, and ETFs that are comprised principally of listed securities
Planned changes in the United States have Canadian regulators pondering possible changes