Japan

The Nikkei 225 and TOPIX are the two primary stock market indices in Japan, but they are calculated differently. The Nikkei 225 is a price-weighted index of 225 top-rated companies listed on the Tokyo Stock Exchange, similar to the Dow Jones Industrial Average in the US. This means stocks with higher share prices have more influence on the index's movement. In contrast, the Tokyo Stock Price Index (TOPIX) is a market-capitalization-weighted index that includes all domestic companies listed on the TSE's Prime Market. Because it covers a broader range of companies (over 2,000) and is weighted by market value, institutional investors often consider TOPIX a better representation of the overall Japanese economy.

The Japanese Yen (JPY) is considered a safe haven primarily due to Japan's status as the world's largest creditor nation. Japanese investors hold massive amounts of foreign assets. When global markets become volatile or fear rises, these investors often repatriate their money—selling foreign assets and buying back Yen to bring it home. This surge in demand drives up the Yen's value during crises. Additionally, Japan's long history of political stability, large current account surplus, and highly liquid markets reinforce the Yen's perception as a secure place to park capital during economic storms, causing it to strengthen when other risk assets fall.

The "Lost Decades" refer to the period of economic stagnation in Japan starting after the asset price bubble burst in late 1991. For nearly 20 to 30 years, Japan grappled with low growth, deflation (falling prices), and a banking crisis caused by bad loans. During this time, the Nikkei 225 fell from a peak of nearly 39,000 in 1989 to under 8,000 by 2003. It wasn't until February 2024 that the Nikkei finally reclaimed its 1989 all-time high. This era fundamentally shaped modern central banking, as the Bank of Japan pioneered zero-interest rate policies and quantitative easing to try to reignite growth, strategies later adopted by the US and Europe.

JGBs stands for Japanese Government Bonds. They are debt securities issued by the government of Japan to finance its budget. The JGB market is one of the largest and most liquid sovereign bond markets in the world. Because the Bank of Japan owns a massive portion of outstanding JGBs (often over 50%) to control interest rates, the JGB market is sometimes called "the widow-maker" trade. Traders who short JGBs, betting that yields must rise (and prices fall), have historically been crushed by the BOJ's unlimited buying power. However, as the BOJ normalizes policy, JGB yields are becoming more volatile and market-driven again.

A weak Yen is a double-edged sword for Japan. On one hand, it is a boon for Japan's giant export sector (like Toyota and Nintendo), as their products become cheaper for foreign buyers and their overseas profits are worth more when converted back to Yen. This often boosts the stock market (Nikkei). On the other hand, a weak Yen hurts domestic households and small businesses by making imported energy, food, and raw materials more expensive, fueling "cost-push" inflation. This dynamic creates a delicate balancing act for policymakers who want to support exporters without crushing consumer purchasing power.