Asked AI: Stocks, Market Capitalization, Financial Assets, G20

Prompt
https://youtu.be/pJ7uO_8AUis

What is the approximate market capitalization of stock markets in each country, around the G20?
Around G20

Gemini's answer
The video (900 seconds [Why did the market suddenly become volatile?]) analyzed that the background of the recent stock price plunge is the oversupply of stocks (collapse of supply-demand balance) in the market due to US employment statistics, geopolitical risks, and large-scale IPOs/POs (Google, Meta, SpaceX, OpenAI, Anthropic, etc.).

With such huge IT companies and AI/space ventures planning massive fundraising one after another, I am curious about the scale of the global market again, specifically how much money is needed to support these purchases in the market.

I have summarized the approximate market capitalization of stock markets around the world, focusing on major G20 countries (latest rough data).

Global Stock Market Capitalization Ranking (Focusing on major G20 countries)

Currently, the total market capitalization of the entire global stock market is hovering around 110 to 120 trillion US dollars (approximately 17 to 19 quadrillion yen). However, the content is in a "dominant" state where the United States holds an overwhelming share.

| Country/Region (Major Markets) | Estimated Market Capitalization (USD equivalent) | Characteristics/Major Corporate Sectors |
| --- | --- | --- |
| United States <br>

<br>(NYSE / NASDAQ) | Approx. 50 to 55 trillion dollars <br>

<br>(45% to over 50% of global share) | Concentrated with "Big Tech (Google, Meta, etc.)" mentioned in the video, AI semiconductors, and huge ventures like SpaceX. An overwhelming dominant force occupying nearly half of the market in one country. |
| China <br>

<br>(Shanghai / Shenzhen / Hong Kong) | Approx. 10 to 11 trillion dollars | The second largest scale in the world after the US. Centered on tech companies like Tencent and Alibaba, and state-owned banks and energy companies. |
| Europe (Entire EU region) <br>

<br>(Euronext, etc.) | Approx. 6 to 7 trillion dollars | Driven by France (luxury brands like LVMH), Germany (SAP, major automakers), etc. As G20, it is the total value of major countries (France, Germany, Italy). |
| Japan <br>

<br>(Tokyo Stock Exchange) | Approx. 6.5 to 7 trillion dollars | Competing for 3rd to 4th place in the world. In addition to manufacturing industries like Toyota Motor, SoftBank Group mentioned in the video and semiconductor/memory-related stocks significantly influence the index. |
| India <br>

<br>(National Stock Exchange) | Approx. 4.5 to 5 trillion dollars | Growing rapidly in recent years, with the momentum to surpass individual major European countries in market capitalization. Centered on IT like Infosys and conglomerates like Reliance. |
| United Kingdom <br>

<br>(London Stock Exchange) | Approx. 3 to 3.5 trillion dollars | A traditional market centered on finance, energy (BP, Shell), pharmaceuticals (AstraZeneca), etc. |
| Saudi Arabia <br>

<br>(Tadawul) | Approx. 2.5 to 3 trillion dollars | The largest market in the Middle East, with the state-owned oil company "Saudi Aramco" accounting for the majority. |
| Canada <br>

<br>(Toronto Stock Exchange) | Approx. 2.5 to 3 trillion dollars | A market where resource/energy-related companies and major financial institutions account for a large proportion. |
| Australia <br>

<br>(Stock Exchange) | Approx. 1.7 to 2 trillion dollars | Huge mineral resource companies like BHP and the four major banks account for the top market capitalization. |
| South Korea <br>

<br>(Korea Exchange) | Approx. 1.5 to 1.8 trillion dollars | Highly dependent on memory and semiconductors, such as Samsung Electronics and SK Hynix, which were introduced in the video as being "bought by civil servants using leverage." |
| Brazil / Mexico | 500 billion to 1 trillion dollars each | The top G20 countries in South America. Centered on resources, energy (Petrobras, etc.), and major finance. |

Are there any countries you would like to delve deeper into regarding their market size or dependence on specific sectors (such as semiconductors or AI)?

Prompt
Wasn't Japan's financial assets around 2,000 trillion yen?
How much are the financial assets of other countries?

Gemini's answer
As you mentioned, it was said until recently that "Japan's household financial assets are 2,000 trillion yen," but currently, due to rising stock prices, the weak yen, and the spread of the new NISA, it has expanded further to approximately 2,351 trillion yen (latest data as of early 2026), reaching a record high.

Now, let's look at the scale of "household financial assets (the total of cash, deposits, stocks, insurance, etc., held by individuals)" in major countries (centered on the G20) to see where they stand.

Currently, the total global household financial assets have reached approximately 333 trillion US dollars (about 5 quadrillion yen), but here too, the United States boasts a scale that is in a different league.

Comparison of household financial assets in major countries (approximate values)

| Country/Region | Total Financial Assets (USD / Approximate JPY equivalent) | Characteristics/Asset Composition Ratio |
| --- | --- | --- |
| United States | Approx. $135 - $140 trillion <br>

<br>(Approx. 21 - 22 quadrillion yen) | Accounts for about 40% of the global total and is the overwhelming leader. Since over 50% of assets are invested in "stocks and investment trusts," assets have exploded due to market expansion over the past few years. |
| China | Approx. $35 - $40 trillion <br>

<br>(Approx. 5,400 - 6,200 trillion yen) | The second largest after the US. While personal assets have surged with rapid economic growth, there is a trend of shifting funds to safer bank deposits and bonds due to the recent real estate market slump. |
| Japan | Approx. $15.1 trillion <br>

<br>(Approx. 2,351 trillion yen) | The world's 3rd largest asset power. For many years, "cash and deposits" accounted for over 50%, but recently, the investment ratio has finally risen due to high stock prices and the new NISA effect, with the cash/deposit ratio falling below 50% for the first time. |
| Germany | Approx. $8.5 - $9 trillion <br>

<br>(Approx. 1,300 - 1,400 trillion yen) | Top in Europe. Similar to Japan, the national character is relatively conservative (savings-oriented), but diversification into insurance, pensions, and investment trusts is slightly more advanced than in Japan. |
| United Kingdom | Approx. $8 - $8.5 trillion <br>

<br>(Approx. 1,200 - 1,300 trillion yen) | With the background of London being an international financial center, a high proportion of management in financial products such as private pensions and investment trusts is a characteristic. |
| France | Approx. $7.5 - $8 trillion <br>

<br>(Approx. 1,100 - 1,200 trillion yen) | A concentration of wealth in Europe alongside the UK and Germany. Because there is a preferential tax system for savings accounts (such as Livret A), defensive assets are also substantial. |
| India | Approx. $5 - $6 trillion <br>

<br>(Approx. 770 - 930 trillion yen) | Along with population growth and economic expansion, the financial assets of the wealthy and middle class are expanding at a furious pace. Inflows into the stock market are increasing from the traditional belief in "gold." |

The decisive difference in the "content" between Japan and overseas

Beyond the total amounts of each country, what is interesting is the "speed of growth (past 20 years)".
While the US has increased its household financial assets by3.3 times over these 20 years, Japan has only increased by about 1.5 times.

What created this difference is the "asset composition ratio (portfolio)," which also connects to the previous discussion (market capitalization of the stock market).

• United States: Over half (approx. 50-55%) of assets are held in "stocks and investment trusts." It is a structure where personal assets automatically grow as the market grows.

• Japan: Half (approx. 48%) of assets are still held in "cash and deposits." While the principal is guaranteed, in an era of ultra-low interest rates and inflation, this means "diminishing value," making it difficult to benefit from growth.

The reason why "from savings to investment" is being called for so strongly in Japan recently, and why the new NISA is gaining such momentum, is precisely a manifestation of the movement to bridge this gap—the "3.3x in the US vs. 1.5x in Japan"—and to link personal assets to national and global growth.

Whether Japan's over 2,300 trillion yen in buried money will continue to flow into global stock markets (especially high-tech and AI-related sectors as seen previously) is a very interesting phase from the perspective of supply and demand.

PR