Which are the top 10 stock markets that introduced significant changes to their operating rules this year?

The top 10 stock markets that have introduced significant changes to their operating rules in 2021 are:

1. New York Stock Exchange (NYSE): Introduced new criteria for direct listings and allowed for companies to raise capital through a direct listing.
2. Nasdaq Stock Market: Proposed diversity requirements for the boards of companies listed on its exchange.
3. London Stock Exchange (LSE): Launched a new segment called the High Growth Segment, aimed at attracting technology companies with high growth potential.
4. Shanghai Stock Exchange (SSE): Introduced new rules for technology companies planning to list on the STAR Market, including greater flexibility in profitability requirements.
5. Hong Kong Stock Exchange (HKEx): Made changes to its listing rules to attract more technology companies, including allowing companies with weighted voting rights (WVR) to list.
6. Tokyo Stock Exchange (TSE): Revised its listing rules to attract more startup companies by allowing them to list with lower profitability requirements.
7. Australian Securities Exchange (ASX): Updated listing rules to enhance corporate governance and increase transparency, including additional disclosure requirements for companies seeking IPOs.
8. Singapore Exchange (SGX): Introduced new rules to enhance governance and strengthen the IPO process, including requiring independent shareholders’ approval for significant acquisitions.
9. Bolsa Mexicana de Valores (BMV): Introduced new rules aimed at attracting more tech companies to list on its exchange, including the addition of a new Growth and Venture Capital Market segment.
10. Toronto Stock Exchange (TSX): Enhanced its listing standards for Special Purpose Acquisition Companies (SPACs), requiring additional disclosure and accountability measures.

Please note that these changes are specific to 2021 and may be subject to further updates or modifications.