The Reserve Bank of India has raised a clear red flag on the structure of the ongoing equity rally across Asia, cautioning that market gains are increasingly dependent on a small cluster of large technology stocks tied to artificial intelligence. In its latest Financial Stability Report, the central bank warned that such narrow leadership makes Asian markets vulnerable to sudden shifts in global risk sentiment, particularly if US equities see a meaningful correction.

Asian equity markets have delivered impressive year-to-date returns, benefiting from easing inflation pressures, resilient growth expectations, and optimism around technological disruption driven by AI. However, beneath the headline performance, market breadth has steadily narrowed. According to the RBI, this pattern closely resembles the US equity market, where a handful of mega-cap technology companies have dominated index returns over the past year.

The central bank noted that optimism around AI is not confined to the US. Asian indices have increasingly become reliant on large technology firms that are perceived to be direct beneficiaries of AI-led investment cycles. This concentration, while supportive during upswings, historically amplifies downside risks during corrections.

The RBI highlighted that a small number of AI-linked stocks now account for nearly half of the total returns in several major Asian markets, including Hong Kong, South Korea, and Taiwan. This mirrors developments in the US, where just seven stocks contribute roughly 50 percent of the S&P 500’s returns.

The concentration is even more pronounced in parts of Asia. In South Korea, only two stocks are responsible for half of the market’s year-to-date gains, while in Taiwan, a single stock accounts for 50 percent of index returns. Hong Kong shows a similar skew, with six stocks driving half of the performance.

While benchmark indices appear strong on the surface, the RBI stressed that gains are unevenly distributed, masking fragility underneath. Such dependence on a narrow leadership group makes markets more sensitive to valuation resets or earnings disappointments in these stocks.

The RBI’s warning is significant because market concentration often acts as a transmission channel for global shocks. If US equities particularly AI-heavy technology stocks were to correct sharply, Asian markets with similar leadership structures could face amplified spillovers.

The central bank explicitly cautioned that “a major correction in US equities could become a global systemic risk,” dragging down Asian markets and creating broader regional equity stress. For policymakers, this raises concerns not just about market volatility but also about potential feedback loops into financial stability, capital flows, and investor confidence.

From an investor perspective, the message is clear: index-level strength may be overstating true market health.

According to data cited in the report, South Korea’s KOSPI has surged around 72.3 percent year-to-date, making it the strongest-performing major Asian market. Hong Kong’s Hang Seng has gained 27.4%, while the MSCI Asia-Pacific index is up 23.5%. Taiwan’s TAIEX has risen 22.5%, Japan’s TOPIX has advanced 21.7%, and China’s CSI 300 has lagged with gains of 14.8%.

Despite these strong numbers, the RBI emphasised that a very small number of stocks are contributing close to 50 percent of index returns across key markets a classic sign of rising concentration risk.

Beyond equity market structure, the RBI also flagged concerns around the scale and financing of AI-related investments. Building AI infrastructure requires enormous capital outlays, with total spending estimated to run into trillions of dollars globally.

So far, leading technology firms have relied largely on robust free cash flows to fund these investments. However, as spending accelerates, debt financing has begun to rise and is expected to increase substantially in the coming years. The report also pointed to complex circular financing structures among AI-focused firms, which are contributing to rapid credit expansion in the sector.

This combination of high leverage, interconnected balance sheets, and elevated valuations could increase systemic risk if cash flows fail to meet expectations.

For Indian markets, the RBI’s assessment serves as both a warning and a policy signal. While India has its own AI and technology growth story, excessive concentration in select stocks could expose domestic indices to global volatility, particularly through foreign portfolio flows. A sharp global tech correction could trigger risk-off behaviour, impacting Indian equities even if domestic fundamentals remain stable.