Asian Momentum Bubble Emerges; Recommendation to Reduce TW/KR Exposure
AI summary card
Asian Momentum Bubble Emerges; Recommendation to Reduce TW/KR Exposure
Bernstein notes that Asia ex-Japan/CN momentum strategy valuations are in bubble territory, especially in Taiwan and Korea, advising investors to reduce exposure and shift toward low-volatility strategies.
- Asian momentum strategies have shown significant YTD outperformance, but valuations have reached historical highs.
- Taiwan and Korea momentum portfolios are valued in bubble territory with overly optimistic earnings expectations.
- Internal market dispersion has hit a 25-year high; low-volatility strategies may regain favor.
- Recommend reducing Taiwan/Korea momentum exposure and shifting towards high-dividend or low-volatility portfolios.
- Japan, China, and India momentum stocks have relatively reasonable valuations; risks are concentrated in Taiwan and Korea.
Report interpretation
Overview
This report analyzes the current status and risks of momentum strategies in the Asian market. While momentum strategies have performed strongly year-to-date across Asia, signs of valuation bubbles and overly optimistic earnings expectations have emerged in Taiwan and Korea, significantly increasing fragility. Institutions advise investors to guard against correction risks, reduce momentum exposure in Taiwan and Korea, and consider shifting to counter-momentum strategies such as low-volatility or high-dividend approaches for defense.
Core views
Strong Momentum Performance but Accumulating Risks: Year-to-date, Asia ex-Japan momentum strategies have generated 36%-38% excess returns, with Taiwan and Korea exceeding 50%. However, this strong performance has led to extreme valuation stretching. The P/B valuation of Asia ex-Japan/CN momentum portfolios exceeds the historical average by 4.2 standard deviations, reaching historical peak levels. High Valuation and Earnings Expectations: Earnings expectations for Taiwan and Korea momentum stocks are at historical peaks, particularly in the technology sector, increasing the risk of earnings revisions peaking. Taiwan momentum valuations exceed long-term average PE by 2.9 standard deviations, while Korea exceeds by 1.9 standard deviations. In contrast, Japan momentum valuations remain reasonable, and China and India momentum stocks have not reached bubble valuations. Extreme Market Dispersion: The momentum effect has driven internal market dispersion to a 25-year high. The divergence between high-volatility/growth stocks and low-volatility/value stocks is extreme, with low-volatility factor momentum levels dropping to historical lows, typically signaling the risk of a style switch from risk-on to risk-off.
Analysis framework
The institution utilizes a quantitative factor analysis framework to compare performance and valuation levels across different regions (Taiwan, Korea, China, India, Japan) and styles (growth, value, low volatility, momentum). The analysis employs historical standard deviations (SD) to measure the extreme level of current valuations relative to historical benchmarks, combined with earnings revision trends and crowding indicators to assess the sustainability of momentum strategies. Additionally, the report identifies extreme market sentiment points and potential style inflection points by analyzing changes in correlations among style factors (e.g., momentum and growth correlation hitting a new high, while correlation with low volatility hits a new low).
Methodology notes
Use historical standard deviation (SD) to measure the extremity of current PE/PB valuations
The report compares current valuations with historical averages and standard deviations (e.g., +2.9SD). If significantly above the historical mean, it is considered a bubble, helping investors quantify valuation risks.
Analyze performance differences and correlations between different style factors (e.g., momentum, low volatility, value)
By observing the dispersion in performance between the momentum factor and the low-volatility factor, one can determine if market sentiment is extreme. Dispersion reaching historical extremes often signals a potential style reversal.
The driving role of earnings expectation revisions on stock price momentum
The report指出 that earnings upgrades are the main driver of momentum stock price increases. However, when expectations reach historical peaks, further upside space is limited, increasing the risk of stock price corrections if expectations are missed.
Identify market risk preference inflection points using extreme values of style dispersion
When the low-volatility factor performs extremely poorly compared to the high-volatility factor, it often marks the peak of risk preference, potentially followed by a switch to risk-off.
Asset mapping & comparison
Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).
- Taiwan Momentum PortfolioNegative Impact
- Strengths
- YTD excess return exceeded 50%
- Weaknesses
- Valuation in bubble territory (+2.9SD), overly optimistic earnings expectations, high weight in tech stocks (85%)
- Comparison
- Higher risk than Japan, China, and India momentum portfolios
- Risks
- Earnings revisions peaking, escalation of war situation, valuation correction
- Korea Momentum PortfolioNegative Impact
- Strengths
- YTD excess return exceeded 50%
- Weaknesses
- Valuation stretched (+1.9SD), highest crowding, high weight in tech stocks (56%)
- Comparison
- Crowding risk higher than Taiwan
- Risks
- Missed earnings expectations, pullback in high-volatility stocks
- Asia Tech Momentum PortfolioNegative Impact
- Strengths
- YTD excess return 63%-80%
- Weaknesses
- Valuation at 31x forward PE (+1SD), earnings expectations at historical highs
- Comparison
- Outperformed overall Asian momentum, but risks more concentrated
- Risks
- Insufficient realization of AI technology expectations, valuation pressure
- Low Volatility/High Dividend PortfolioBeneficial
- Strengths
- Reasonable valuation, defensive nature, positioned favorably for style switch
- Weaknesses
- Underperformed momentum year-to-date
- Comparison
- As a counter-momentum strategy, negatively correlated with momentum portfolios
- Risks
- If momentum trend continues, may continue to underperform
Key data
- Asia ex-Japan Momentum Strategy YTD Excess Return36%-38%Strong YTD performance
- Taiwan/Korea Momentum Strategy YTD Excess Return>50%Performance far exceeds other regions
- Asia ex-Japan/CN Momentum Portfolio PB Valuation+4.2SD4.2 standard deviations above historical average, at historical peak
- Taiwan Momentum Valuation+2.9SD2.9 standard deviations above long-term average PE
- Korea Momentum Valuation+1.9SD1.9 standard deviations above long-term average PE
- Low Volatility Factor Momentum Level25-Year LowDropped to historical lowest levels, signaling style switch risks
Impact & implications
The report considers that the fragility of current momentum strategies is increasing. If war situations escalate again or earnings revisions peak, it could trigger a rapid unwind of momentum strategies (correction risks). This poses risks for investors holding large positions in Taiwan and Korea tech momentum stocks. Investors are advised to diversify into counter-momentum portfolios (such as high-dividend or low-volatility) to cope with potential market style switches and rising volatility. For Japan, China, and India markets, momentum strategies still have some room, but overall Asian market interconnectivity risks should be guarded against.
Risks
- Escalation of war situation accelerating momentum strategy unwind
- Earnings revisions peaking leading to missed expectations
- Further valuation stretching triggering corrections
- Difficulty in timing market style switches
What to watch
- Whether earnings revision trends have peaked
- Whether low-volatility factor performance begins to recover
- Dynamics on war fronts
- Valuation changes in Asian technology sectors