Set against this 20-year upward trajectory has been some stark financial challenges. Just after the handover itself, there was the Asian Financial Crisis of 1997-1998, and in 2008, the Global Financial Crisis. Hong Kong has not been alone in tapping into the China story; other financial centres have been competing for the same business.

Relatively few technology firms have decided to call Hong Kong home, preferring listings in more forgiving US equity markets. There is also the continued requirement of dealing with market malpractice and upgrading market quality.

Against this backdrop, Hong Kong’s financial gatekeepers have never been subject to any sort of qualifications check or test for their jobs, nor is there such a qualification for any of the jobs at these regulatory agencies. Our four gatekeepers come from different backgrounds – Chief Executive of the Hong Kong Monetary Authority Norman Chan is a career civil servant; Chairman of the Securities and Futures Commission Carlson Tong is a retired accountant; Chairman of the Insurance Authority Moses Cheng is a former lawyer; and Hong Kong Exchanges and Clearing (HKEX) Chairman Chow Chung Kong a former business executive.

Their diversity means they bring different types of knowledge and experience to the game. The relatively small financial community in Hong Kong means that the gatekeepers can get by with bilateral meetings and communications.

This kind of chumminess may have sufficed for the previous 20 years, but will it do for the next 20 years?

Hong Kong financial firms and markets are tightly linked to the mainland, and the four will need to work more closely with their mainland counterparts on cross border regulation. Nearly 40 per cent of insurance policies are purchased by mainland Chinese, over 60 per cent of our market cap are Chinese companies, and mainland Chinese are now trading 10 per cent of turnover via the two stock connects.

Meanwhile, HKEX is looking for big companies to raise funds through initial public offerings, including the proposed listing by Saudi Aramco, which if it happens, is expected to raise about US$100 billion (HK$780 billion), the biggest ever sum for an IPO. That estimate is based on the expected five per cent equity offering, valuing the company at US$2 trillion.

Another great debate opened by the HKEX concerns a new board that would allow weighted voting rights.

It was over this issue that prompted Alibaba Group Holdings -- which owns the South China Morning Post -- to stage its US$25 billion IPO in 2014 in New York, which has led to angst ever since about HKEX’s listing rules.

Diehards prefer one share, one vote. Several big technology firms have stated their wish for preferred voting rights, to insulate the owners from quarterly market pressures. The sacking of Uber Chief Executive Travis Kalanick and the glaring underperformance of Snap Inc. (where shareholders receive no voting rights at all) have added some fuel to the fire in this debate (see: A Dual Discussion, p. 36).

Added to these turbulent events are the growing challenge of fintechs and new technology in general. The HKMA in particular has tried to harness this with the introduction of testing zones for financial technology (the so-called Sandbox) though often Hong Kong’s efforts have lagged behind those of Singapore, which has been pushing ahead more aggressively. Singapore’s “sandbox” scheme allows banks and small fintech start-ups to test their tech, while in Hong Kong, the HKMA allows only banks to do so.

Dealing with the multitude of these challenges is our financial regulatory environment. There are, roughly, four models of financial regulation: Institutional (where a banking regulator looks after banks, insurance regulator looks after insurance, etc); Functional (where a banking regulator looks after banking-type businesses); Twin Peaks (where one regulator looks after safety and soundness, while another polices conduct); and the Integrated Approach (where one agency looks after everything).

Singapore has adopted the Integrated Approach, while Hong Kong continues to use the Institutional Approach, dividing responsibility between the four men we interview here. Each of our financial gatekeepers believes that our current approach works well, but it requires that everyone remain friends and talking to each other at all times. If there is one thing they agree on, it is this.

That of course raises the question: what happens when the friendships break down? Friendships don’t last through every phase of life, and as many of Hong Kong’s wealthiest families can attest, smooth successions are not always easy. All four regulators are now in their 60s. Given their emphasis on the importance of maintaining friendships and communication, it’s worth asking about succession plans for each of these agencies.

We can look ahead to ever more challenges in the financial services industries. One very big question is how we will face the regulatory aspect of those challenges, and who will be the gatekeepers of the next 30 years?

(This an article that appears in the July/August issue of The Peak magazine, available now at selected bookstores and by invitation.)