The Global Experience with Tick Size Reform: A Comparative Analysis

A Global Phenomenon

The U.S. Tick Size Pilot Program was not an isolated event. In recent years, a number of other countries have also experimented with tick size reform. These include Japan, Canada, and several countries in Europe. The global experience with tick size reform provides a valuable opportunity to compare and contrast different approaches and to learn from the successes and failures of others.

The Japanese Experience: A Gradual and Cautious Approach

Japan has taken a more gradual and cautious approach to tick size reform than the U.S. The Tokyo Stock Exchange has implemented a series of small, incremental changes to its tick size regime over a period of several years. This has allowed the market to adapt to the changes gradually, and it has avoided the kind of market disruption that was seen in the U.S. during the pilot.

The Japanese experience suggests that a more gradual and cautious approach to tick size reform may be more effective than the kind of "big bang" approach that was taken in the U.S. The Japanese approach has allowed the market to find the optimal tick size for each individual stock, rather than imposing a one-size-fits-all solution.

The Canadian Experience: A Focus on the Venture Market

Canada has taken a more targeted approach to tick size reform. The TMX Group, which operates the Toronto Stock Exchange and the TSX Venture Exchange, has focused its efforts on the venture market. The TSX Venture Exchange is a market for small, early-stage companies, and it has long been a leader in market structure innovation. The TMX Group has implemented a number of changes to its tick size regime for the venture market, including a more dynamic and flexible approach that allows the tick size to be adjusted based on the trading characteristics of the stock.

The Canadian experience suggests that a more targeted approach to tick size reform may be more effective than a one-size-fits-all approach. The needs of the venture market are different from the needs of the senior market, and a more tailored approach is needed.

The European Experience: A Patchwork of Different Approaches

Europe has taken a more fragmented approach to tick size reform. The Markets in Financial Instruments Directive (MiFID II), which came into effect in 2018, introduced a new tick size regime for all of the exchanges in the European Union. However, the implementation of this regime has been left to the individual exchanges, and this has resulted in a patchwork of different approaches across the continent.

The European experience highlights the challenges of implementing a consistent and coherent tick size regime across a large and diverse market. The lack of a centralized authority has made it difficult to coordinate the efforts of the different exchanges, and this has resulted in a more fragmented and less efficient market.

Conclusion: A Global Conversation

The global experience with tick size reform provides a number of valuable lessons. The Japanese experience suggests that a more gradual and cautious approach may be more effective than a "big bang" approach. The Canadian experience suggests that a more targeted approach may be more effective than a one-size-fits-all approach. And the European experience highlights the challenges of implementing a consistent and coherent tick size regime across a large and diverse market.

The global conversation about tick sizes is far from over. The lessons learned from the U.S. Tick Size Pilot Program and from the experiences of other countries will be invaluable as we continue to work to create a more fair and efficient market for all. The path forward will require a more nuanced, data-driven, and holistic approach to market structure reform. It will not be easy, but it is a journey that we must continue to take.