Warren Buffett's Biggest 'Fear' Just Came True

Fin Tek•Feb 9, 2026

Summary

Kuran analyzes the interconnectedness of the Japanese and US economies, focusing on the recent volatility in Japan's bond market. He explains that Japan, long characterized by deflation and near-zero interest rates, is now facing a reckoning as the Bank of Japan raises rates. With a debt-to-GDP ratio exceeding 250%, Japan's rising bond yields are causing investors to flee, creating a 'bond meltdown' that threatens global liquidity.

The main thesis is that the US is following a similar path to Japan but with a delay. Kuran notes that US government debt has surpassed 125% of GDP ($38 trillion), a level Warren Buffett has described as unsustainable. Because Japan is the largest foreign holder of US Treasuries, a crisis in Japan could force a massive sell-off of US debt, destabilizing the dollar's status as the world's reserve currency. Kuran suggests that the market's historical reliance on the 'special status' of the dollar may be coming to an end as global interest rates normalize.

To navigate this environment, Kuran advocates for a strategy of diversification and holding productive assets. He highlights the following areas:

**Japanese Trading Houses:** These five major holding companies are described as smaller versions of Berkshire Hathaway that provide exposure to various industries. Buffett initially invested $6 billion in these firms starting in 2020, a stake that has since grown to over $20 billion as the Japanese economy heated up. Kuran views these as a successful example of diversifying away from US-centric risks.

**International Stocks (Non-US):** Kuran recommends allocating a portion of a portfolio to international markets that lack direct exposure to US fiscal policy. He suggests a model where one-third of a portfolio is dedicated to these stocks to mitigate the risk of a weakening US dollar. This strategy aims to protect long-term wealth from domestic currency erosion.

**US Large Cap and Growth Stocks:** While cautioning against over-concentration in the Magnificent 7, Kuran still advises keeping exposure to productive US companies. He suggests a split of one-third in large-cap and one-third in growth stocks, noting that equities generally act as a hedge against inflation. The focus remains on companies with real earnings rather than speculative assets.

Mentioned Stocks

JAPANESE TRADING HOUSES

Sentiment: BUYAction: RECOMMENDED

Reasoning: Kuran highlights these companies (specifically the five largest) as a brilliant hedge used by Warren Buffett. They are productive holding companies that have already seen a 3x to 6x return for Berkshire Hathaway since 2020. Kuran views them as a way to diversify out of the US dollar and into an economy that is now seeing growth after decades of deflation.

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US LARGE CAP STOCKS

Sentiment: HOLDAction: RECOMMENDED

Reasoning: Kuran suggests keeping one-third of a portfolio in US large caps but warns against being over-concentrated in the Magnificent 7. He views these as productive assets that can resist inflation, but stresses that they should not be the sole focus of an investor's strategy given the currency risks facing the US dollar.

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INTERNATIONAL STOCKS

Sentiment: BUYAction: RECOMMENDED

Reasoning: Kuran recommends a one-third allocation to international stocks that do not have high exposure to the US market. This is presented as a 'Rule #1' diversification strategy to protect the portfolio from a potential devaluation of the US dollar and domestic fiscal instability.

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