Here are a few options for a WordPress post_tag description for “beta值” (beta value) in Traditional Chinese, ranging in formality and specificity:

**Option 1: Concise & Direct**

* **Description:** 衡量股票或投資組合系統風險的指標。 (A metric measuring the systematic risk of a stock or investment portfolio.)

**Option 2: More Introductory**

* **Description:** 了解 Beta 值，掌握投資組合的波動性。 (Learn about beta values and understand the volatility of investment portfolios.)

**Option 3: Investment Focused**

* **Description:** 在股票分析中常用的 Beta 值，用於評估資產與市場的相關性。 (Beta value commonly used in stock analysis, used to assess the correlation of assets to the market.)

**Option 4: Financial Theory Focused**

* **Description:** 探索 Beta 值在資本資產定價模型 (CAPM) 中的重要性，以及其風險衡量作用。 (Explore the importance of beta value in the Capital Asset Pricing Model (CAPM), and its use as a risk measure.)

**Option 5: Broad and Generally Applicable**

* **Description:** Beta 值是金融分析中一個關鍵概念，用於測量資產相對於整體市場的波動性。 (Beta value is a key concept in financial analysis, used to measure the volatility of an asset relative to the overall market.)

**Choosing the best option:**

* Consider your blog’s target audience: Are they absolute beginners, experienced investors, or financial professionals?
* What kind of content about “beta 值” are you publishing most of? The description should reflect the context of the tags.
* Keep it concise. Avoid making it too long (WordPress will often truncate descriptions in some displays). Even the longer ones above would fit well.

Regardless of which you choose, make sure it’s clear, accurate and useful! Good luck!