{"id":307537,"date":"2025-07-15T21:29:30","date_gmt":"2025-07-15T21:29:30","guid":{"rendered":"https:\/\/pocketoption.com\/blog\/news-events\/data\/beta-coefficient-of-stocks\/"},"modified":"2025-07-15T21:29:30","modified_gmt":"2025-07-15T21:29:30","slug":"beta-coefficient-of-stocks","status":"publish","type":"post","link":"https:\/\/pocketoption.com\/blog\/en\/knowledge-base\/trading\/beta-coefficient-of-stocks\/","title":{"rendered":"Stock Beta Coefficient: The Most Accurate Investment Risk Measurement Tool in 2025"},"content":{"rendered":"
<\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":45,"featured_media":192709,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[20],"tags":[33,41,46,39,45],"class_list":["post-307537","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trading","tag-ai","tag-copy","tag-how","tag-platform","tag-stock"],"acf":{"h1":"Pocket Option: Optimal Investment Strategy With Stock Beta Coefficient","h1_source":{"label":"H1","type":"text","formatted_value":"Pocket Option: Optimal Investment Strategy With Stock Beta Coefficient"},"description":"Discover the stock beta coefficient - an essential tool helping you measure risk and optimize investment returns on the Vietnamese stock market. Detailed guidance from Pocket Option.","description_source":{"label":"Description","type":"textarea","formatted_value":"Discover the stock beta coefficient - an essential tool helping you measure risk and optimize investment returns on the Vietnamese stock market. Detailed guidance from Pocket Option."},"intro":"In the context of Vietnam's highly volatile stock market in 2025, understanding and accurately applying the stock beta coefficient has become a survival skill for successful investors. Through this article, you will grasp not only the theory but also practical strategies to leverage beta in building an investment portfolio that matches your own risk tolerance.","intro_source":{"label":"Intro","type":"text","formatted_value":"In the context of Vietnam's highly volatile stock market in 2025, understanding and accurately applying the stock beta coefficient has become a survival skill for successful investors. Through this article, you will grasp not only the theory but also practical strategies to leverage beta in building an investment portfolio that matches your own risk tolerance."},"body_html":"

What is Stock Beta? Basic Concepts for Vietnamese Investors<\/h2><\/div>

Accurate risk assessment is the first step to winning in the Vietnamese stock market. In the modern risk analysis toolkit, a stock's beta coefficient is considered the \"compass\" helping investors measure stock volatility scientifically.<\/p><\/div>

What is stock beta? Simply put, it's a number that precisely measures how much a stock \"dances\" when the general market fluctuates. Specifically for Vietnam, beta tells you how strongly or weakly your stock will react when the VN-Index rises or falls by 1%.<\/p><\/div>

The beta coefficient is calculated based on statistical analysis of the correlation between stock price movements and VN-Index fluctuations. In the Vietnamese market, data is typically collected from the most recent 2-3 years to ensure practicality.<\/p><\/div>

Beta Value<\/th>Practical Meaning<\/th>Vietnamese Stock Examples<\/th><\/tr><\/thead>
Beta = 1<\/td>Stock rises\/falls exactly with the market<\/td>MBB, FPT, HPG<\/td><\/tr>
Beta > 1.3<\/td>Stock fluctuates 30% more than the market<\/td>SSI, HCM, VND, NVL<\/td><\/tr>
0.5 < Beta < 0.8<\/td>Stock fluctuates 20-50% less than the market<\/td>VNM, DHG, REE, POW<\/td><\/tr>
Beta < 0.3<\/td>Stock hardly affected by the market<\/td>NT2, TRA, DVP<\/td><\/tr>
Beta < 0<\/td>Stock typically rises when market falls and vice versa<\/td>Rare in Vietnam (gold ETF)<\/td><\/tr><\/tbody><\/table><\/div><\/div>

Pocket Option's analysis shows that leading Vietnamese companies have distinctive industry-specific betas: banking (beta 1.1-1.5), real estate (beta 1.3-1.7), pharmaceuticals (beta 0.5-0.8), electricity-water (beta 0.3-0.6). Understanding industry-specific beta characteristics helps you predict stock reactions under different market conditions.<\/p><\/div>

Method for Calculating Stock Beta Coefficient in the Vietnamese Context<\/h2><\/div>

Accurately calculating a stock's beta coefficient requires a scientific method. Pocket Option has developed specialized analysis tools for the Vietnamese market, helping you determine beta with just a few clicks.<\/p><\/div>

Standard Beta Calculation Formula<\/h3><\/div>

The scientific formula for calculating beta is:<\/p><\/div>

<\/tbody><\/table><\/div><\/div>

Where:<\/p><\/div>

  • Cov(ri, rm): Covariance between stock returns (ri) and VN-Index returns (rm)<\/li>
  • Var(rm): Variance of VN-Index returns<\/li><\/ul><\/div>

    The actual beta calculation process includes 5 specific steps:<\/p><\/div>

    1. Collect daily closing prices of the stock and VN-Index (typically the most recent 1-2 years)<\/li>
    2. Convert to daily percentage returns for both the stock and VN-Index<\/li>
    3. Calculate the covariance between these two return series<\/li>
    4. Calculate the variance of the VN-Index return series<\/li>
    5. Apply the formula beta = covariance \/ variance<\/li><\/ol><\/div>

      When calculating stock beta in Vietnam, note these 4 specific factors:<\/p><\/div>

Beta = Cov(ri, rm) \/ Var(rm)<\/th><\/tr><\/thead>
Vietnamese Market Characteristics<\/th>Adjustments When Calculating Beta<\/th><\/tr><\/thead>
Low liquidity for many stocks<\/td>Exclude trading sessions with < 100,000 shares<\/td><\/tr>
Price fluctuation limit of \u00b17%<\/td>Apply Dimson adjustment for limited range<\/td><\/tr>
Newly listed stocks < 2 years<\/td>Use beta of equivalent companies in the same industry<\/td><\/tr>
Sudden capital structure changes<\/td>Calculate beta before and after changes, take weighted average<\/td><\/tr><\/tbody><\/table><\/div><\/div>

Real Example of Beta Calculation with Actual Data from HOSE<\/h3><\/div>

Case study: Calculating VHM (Vinhomes) beta in the last 12 months:<\/p><\/div>

Step 1: Collect 252 trading sessions (2024-2025)<\/th><\/tr><\/thead>
Step 2: Calculate daily returns of VHM and VN-Index<\/td><\/tr>
Step 3: Covariance (VHM, VN-Index) = 0.00031<\/td><\/tr>
Step 4: Variance (VN-Index) = 0.00022<\/td><\/tr>
Step 5: VHM Beta = 0.00031\/0.00022 = 1.41<\/td><\/tr><\/tbody><\/table><\/div><\/div>

The result beta = 1.41 for VHM shows this stock reacts 41% more strongly than the general market. Specifically, when VN-Index rises 1%, VHM tends to rise 1.41%; when VN-Index falls 2%, VHM may fall 2.82%.<\/p><\/div>

Analyzing What Beta Means in Stocks When Applied to Investment Portfolios<\/h2><\/div>

Understanding what beta means in stocks helps you build an investment portfolio balanced between risk and return. On the Pocket Option platform, you can quickly scan the beta of over 300 listed stocks in Vietnam and visually compare them through color charts.<\/p><\/div>

When building a portfolio based on stock beta coefficient, you need to decide on 3 factors:<\/p><\/div>