Asian Central Banks Diverge: From 'Weak Rate Hikes' to 'Strong Rate Hikes'

Overview

This report provides an in-depth analysis of the latest macroeconomic trends and monetary policy directions in Asian emerging markets, as well as in Japan and Australia/New Zealand. The core view is that the logic behind Asian central banks' rate hikes is undergoing a structural shift: from past 'weak rate hikes'—forced by the need to maintain macroeconomic stability (as seen in Indonesia and the Philippines responding to exchange rate and inflation pressures)—to 'strong rate hikes' driven by robust economic growth and rising inflation risks (as seen in South Korea and Taiwan). The report dissects the latest economic data from each country, particularly the differentiated impact of the AI tech wave on exports in South Korea, Taiwan, and China, and makes predictions about the Bank of Japan's policy outlook in the absence of its governor.

Core views

South Korea and Taiwan: Tech Boom Drives Growth Revisions South Korea's economy shows strong momentum, with Q1 GDP growth revised up to 7.5% (annualized q/q), largely driven by income effects from a massive boost in trade terms. This gain has translated more into corporate profits and capital expenditure than wage-driven consumption. Based on this, J.P. Morgan significantly raised South Korea's 2026 full-year real GDP growth forecast from 3.0% to 3.7%. Early export data show continued strength in the tech sector, with exports up 85.9% year-to-date through June 10. However, the labor market remains weak, with employment declining for the third consecutive month in May, indicating that the tech dividend has yet to broadly benefit households. Taiwan also benefits from the tech upcycle, with May exports rebounding across the board, with both tech and non-tech sectors performing strongly. TSMC's robust capital expenditure guidance suggests that AI-driven supply shortages persist. The report raised Taiwan's Q2 GDP forecast by 2.3 percentage points to 4.5% (annualized q/q) and raised the full-year 2026 growth forecast to 9.9%. Despite uncertainty over U.S. tariff investigations, the global spread of capital expenditure from tech to non-tech sectors supports export momentum. China and Japan: Structural Divergence and Policy Dynamics China's May trade data once again exceeded expectations, with exports up 19.4% year-on-year, driven primarily by AI-related high-tech products (such as memory chips and modules) and new energy products. However, this growth is distinctly 'price-driven,' with about 60% of export growth coming from just a few product categories, reflecting price increases rather than volume surges. This means that headline export data overstate the pull on domestic industrial production. On the domestic demand side, retail sales remain weak, fixed asset investment stays in contraction territory, and Q2 growth risks lean to the downside. In terms of credit, although new loans turned positive in May, they were still the weakest May since 2009, with medium- and long-term loans for households and businesses continuing to contract. For Japan, the report expects the Bank of Japan to raise rates by 25bp to 1.0% at next week's meeting. Although Governor Kazuo Ueda is absent due to illness, there is already consensus within the board on the direction of the rate hike. The real market focus lies on forward guidance and the quantitative tightening (QT) plan. If the central bank stops reducing its government bond purchases—as rumored media reports suggest might happen after April 2027—even a rate hike could be interpreted as dovish by the market. Additionally, the Japanese government passed a supplementary budget of 3.1 trillion yen for energy subsidies; if oil prices stay high, the fiscal burden will intensify. ASEAN and Australia/New Zealand: Defensive Rate Hikes and Wait-and-See Approach Indonesia's central bank unexpectedly raised rates by 25bp this week to 5.50% to counter the historic high of the U.S. dollar against the Indonesian rupiah at 18,200 and the resulting foreign exchange pressures. The report expects another 25bp increase to 5.75% at next week's regular meeting. The Philippines faces the region's most severe inflation surge; although headline inflation eased slightly to 6.8% in May, core pressures remain high, and the Philippine central bank is expected to aggressively raise rates by 50bp to 5.00% next week to anchor expectations. Australian business confidence has rebounded but remains low, with capacity utilization falling to its lowest level in over a year. Given the economic slowdown and narrow inflationary impulses, the Reserve Bank of Australia is expected to hold steady. New Zealand's Q1 GDP is projected to rebound by 0.8%; macroeconomic conditions support a cyclical recovery, and unemployment may have peaked.

Analysis framework

This report adopts a typical 'top-down' macroeconomic analysis framework, combining the 'supply-demand framework' with the 'monetary policy reaction function' for inference. First, in growth analysis, the report uses a 'quantity-price decomposition' method, especially for China and Taiwan's export data, distinguishing between price effects (such as rising chip prices) and quantity effects (increased actual shipments), thus more accurately assessing their true pull on real industrial production. For South Korea, the report focuses on analyzing how 'trade terms' shocks affect Gross Domestic Income (GDI) and corporate profits, highlighting the structural feature that the corporate sector benefits more than households in income distribution. Second, in monetary policy judgment, the report constructs a 'policy dilemma' analytical logic: differentiating between 'rate hikes for stabilization' (responding to currency depreciation and imported inflation, as in Indonesia and the Philippines) and 'rate hikes for overheating' (responding to strong demand and endogenous inflation, as in South Korea and Taiwan). This classification helps investors understand the economic implications behind different central banks' rate hikes and their potential impact on market sentiment. Finally, the report combines high-frequency data (such as South Korea's customs export data and Japan's Economic Observer Survey) with low-frequency macroeconomic data (GDP, CPI), cross-validating them to refine quarterly GDP tracking models, demonstrating the application of the 'nowcasting' methodology in macro research.

Methodology notes

• Industry/sector analysis frameworkQuantity-Price Decomposition

  When analyzing export data, distinguish between price factors (such as rising chip unit prices) and quantity factors (increased actual shipments) in nominal growth.

  The report points out that China's strong exports are mainly price-driven, meaning their pull on domestic real industrial output is limited. This approach avoids being misled by nominal data and allows for a more precise assessment of real economic activity.

• Macroeconomic framework

  Trade Terms Shock and Income Distribution Effects

  The report notes when analyzing South Korea that the income surge from improved trade terms mainly manifests as corporate operating surplus (profits), rather than employee compensation (wages). This explains why GDP growth is strong but employment and consumption recovery lag behind, helping readers understand the divergence between macro data and micro perceptions.

• Cyclical and Business Cycle FrameworkBusiness Cycle Turning Point Analysis

  Using high-frequency data (such as customs exports and PMI) to capture marginal changes in economic activity and thereby refine quarterly GDP forecasts.

  The report leveraged the strong performance of early export data from South Korea and Taiwan to quickly revise up the Q2 GDP tracking forecast. This demonstrates how high-frequency indicators can anticipate economic turning points before official GDP releases.

• Macroeconomic framework

  Two Types of Monetary Policy Rate Hike Logics: Defensive vs. Proactive

  The report categorizes Asian central banks' rate hikes into two types: one is 'defensive rate hikes' aimed at addressing external shocks (exchange rates, imported inflation, as in Indonesia), and the other is 'proactive rate hikes' triggered by internal economic overheating (as in South Korea). This classification helps gauge the extent to which rate hikes will restrain economic growth.

Key data

• South Korea's 2026 GDP Growth Forecast3.7%Revised up from 3.0%, driven mainly by improved trade terms
• Taiwan's Q2 2026 GDP Growth Forecast4.5% (q/q saar)Sharply raised by 2.3 percentage points from 2.2%
• Taiwan's Full-Year 2026 GDP Growth Forecast9.9%Revised up from 9.6%
• China's May Export YoY Growth19.4%Exceeds expectations, driven mainly by high-tech product prices
• Indonesia's Central Bank Emergency Rate Hike25bpInterest rate rises to 5.50%, expected to rise another 25bp next week
• Philippines' Central Bank Expected Rate Hike50bpExpected to raise rates to 5.00% next week to tackle high inflation
• Bank of Japan's Expected Post-Hike Interest Rate1.0%Expected to raise rates by 25bp next week
• China's May New RMB Loans520 billion yuanWeakest May since 2009, lower year-on-year growth

Impact & implications

For Asian markets, the divergence in monetary policy implies differences in investment logic. For South Korea and Taiwan, strong growth and the potential 'strong rate hike' cycle could support their currencies, but investors should watch out for volatility after valuations become too high; their stock markets will continue to be led by the AI capital expenditure cycle. For Indonesia and the Philippines, defensive rate hikes aim to stabilize exchange rates, but if the global economy slows down, excessive tightening could hurt domestic demand, and bond yields could remain elevated. For China, the structural price-driven nature of exports means the traditional 'export-led manufacturing' logic is weakening; policy focus may shift more toward fiscal stimulus to boost domestic demand. The renminbi exchange rate will remain resilient supported by exports, but room for rate cuts is limited by external conditions and exchange rate targets. Volatility in the Japanese bond market will depend more on the pace of QT than on the magnitude of rate hikes alone; if QT slows down, upward pressure on long-end yields could ease.

Risks

• Uncertainty over U.S. tariff policies (such as Section 301 investigations) could hit non-tech exports from Asia.
• Geopolitical conflicts in the Middle East keep energy prices high, exacerbating imported inflation and fiscal burdens.
• If the Bank of Japan stops reducing bond purchases, it could lead to further yen weakness and runaway long-term yield curves.
• China's domestic demand recovery falls short of expectations, prolonging deflationary pressures.
• A slowdown in global tech capital expenditure could hurt export momentum in South Korea and Taiwan.

What to watch

• Bank of Japan's guidance at next week's meeting on its post-2027 government bond purchase plan.
• Whether Taiwan's central bank will signal rate hikes at next week's meeting to address rising core inflation.
• The magnitude of rate hikes and subsequent policy paths from Indonesia and the Philippines next week.
• China's upcoming release of May industrial value-added, retail sales, and fixed asset investment data.
• U.S. tariff policy developments on Asian tech products.