After decades of near-zero interest rates, the Bank of Japan is preparing to raise its policy rate by 25 basis points to around 0.75%, a level not seen in nearly 30 years. While the quantum of the hike appears limited, the shift carries far greater significance than the number itself. It reflects a clear change in Japan’s monetary stance and has reopened debate around one of the most influential forces in global financial markets: the yen carry trade.

For much of the past two decades, Japan’s ultra-low interest rate environment has made the yen a preferred funding currency for global investors. Large institutional funds, hedge funds, and proprietary trading desks borrowed cheaply in yen and deployed capital into higher-yielding assets across the world—US equities, emerging market bonds, credit instruments, and riskier asset classes. The strategy worked as long as Japanese rates stayed anchored near zero and the yen remained weak or stable.

The mechanics of the carry trade are simple but powerful. Investors profit from the interest rate differential between low-cost yen borrowing and higher returns elsewhere. When the yen depreciates, gains are amplified because repaying yen-denominated loans becomes cheaper in global currency terms. Over time, this trade has grown into a deeply embedded pillar of global liquidity, quietly supporting risk appetite across markets.

The risk emerges when this equilibrium shifts. A strengthening yen or rising Japanese interest rates increase funding costs and erode returns. When that happens quickly, investors are often forced to unwind positions. Such unwinds are rarely orderly. Selling pressure hits global equities and emerging market assets, demand for yen spikes, and the currency strengthens further—creating a feedback loop that accelerates volatility.

That is the backdrop against which the Bank of Japan’s impending decision is being watched. While experts remain divided on whether a full-scale carry trade unwind is imminent, few dispute that the probability of stress has risen. Even a partial repositioning can have outsized effects, given how leveraged and interconnected carry trades tend to be.

What is changing now is not just the policy rate but the direction of policy expectations. For years, markets assumed Japan would remain the anchor of global cheap liquidity. A move to 0.75% challenges that assumption. More importantly, it signals that Japanese policymakers are increasingly comfortable normalizing policy amid persistent inflation and wage growth. This shift reduces the margin of safety for carry traders who have relied on policy inertia.

Why this matters for global markets lies in transmission effects. Historically, episodes of yen carry trade unwinding have coincided with sharp risk-off moves. Global equities correct, high-yield credit spreads widen, and emerging market currencies face pressure as capital is pulled back to fund yen repayments. These episodes often unfold rapidly, leaving limited time for portfolio adjustments.

For India, the implications are indirect but meaningful. Foreign portfolio flows into Indian equities and debt have benefited from abundant global liquidity and risk appetite. A yen-driven risk-off shock could temporarily disrupt these flows, leading to higher volatility in benchmark indices and pressure on rate-sensitive sectors. While India’s macro fundamentals remain stronger than many peers, global deleveraging cycles tend to be indiscriminate in the short term.

Sectorally, global financials, technology stocks, and leveraged asset classes are typically the most sensitive to carry trade dynamics. In India, sectors with higher foreign ownership—such as IT services and large-cap financials—could see short-term volatility if global funds reduce exposure. Currency markets may also react, with emerging market currencies facing intermittent pressure even if domestic fundamentals are intact.

From a policy perspective, the Bank of Japan has been careful in its communication, attempting to avoid triggering panic. Officials have emphasized gradualism and data dependence, suggesting that future hikes will be measured. However, markets tend to react more to changes in direction than to pace. Once the perception shifts from “permanent accommodation” to “normalization underway,” positioning can change quickly.

The bull case argues that the risk of a disorderly unwind is overstated. Proponents note that many carry trades are now better hedged, leverage is more regulated than in past cycles, and global investors are aware of the risk. A gradual yen appreciation, they argue, would allow positions to be adjusted without systemic stress. In this view, the rate hike would represent normalization rather than disruption.

The bear case focuses on positioning and complacency. Years of low volatility have encouraged crowded trades, and even modest currency moves can trigger margin calls in leveraged portfolios. Bears warn that if the yen strengthens sharply—especially during a broader risk-off episode—the unwind could be sudden, amplifying losses across asset classes.

Risks remain concentrated around timing and speed. The biggest threat is not the rate hike itself but an abrupt repricing of expectations. If markets begin to price in a faster normalization path, the yen could strengthen quickly, forcing deleveraging. Another risk lies in global macro conditions: weaker growth or geopolitical shocks could coincide with yen strength, compounding volatility.

As the decision approaches, global investors are watching closely, not because of the immediate rate increase, but because it marks a turning point. The era of the yen as an almost free funding currency may be drawing to a close. Whether this transition is smooth or disruptive will depend less on policy statements and more on how crowded the trade has truly become, a dynamic explored widely in global market commentary and analysis available online.