Here are a few options for the WordPress `post_tag` description, varying in length and focus, all in Traditional Chinese, for the title “跌幅限制”:

**Option 1: Concise & Informative**

> **跌幅限制 (Dūfú xiànzhì):** 股票交易中的一種機制，限制單日股價下跌的幅度，以降低市場恐慌和避免異常波動。

* This is a short, clear explanation of what the tag is about in the context of stocks.

**Option 2: Slightly More Detailed**

> **跌幅限制 (Dūfú xiànzhì):** 指在股票交易市場中，為了防止股價在短時間內劇烈下跌，而設定的每日股價下跌幅度上限。 這個機制旨在穩定市場情緒，防止投資者過度恐慌拋售，並給予停損時間。

* More in-depth, mentions the function of the “跌幅限制.”

**Option 3: Connecting to Related Context**

> **跌幅限制 (Dūfú xiànzhì):** 股票交易的常見術語，指的是交易所為了抑制市場大幅下跌而設置的限制。 了解跌幅限制對於投資者至關重要，需要關注其相關的交易規則，以及如何應對市場波動。 也常與「漲停板」一同討論。

* This option connects “跌幅限制” with related terms, giving it a wider use.

**Option 4: Focus on Practical Application**

> **跌幅限制 (Dūfú xiànzhì):** 對於在股市中交易的投資者而言，跌幅限制是非常重要的概念。 它會影響你的買賣策略和風險管理。 此標籤下的文章將探討跌幅限制的運作，以及如何在交易中使用及保護自己。

* Emphasizes the real-world implications for investors.

**Which one to choose depends on:**

* **Your overall post style:** If your posts are concise, go with Option 1. If you offer more in-depth tutorials, choose Option 2, 3 or 4.
* **The target audience:** Are you writing for beginners (Options 2 & 4 might be better)? Or seasoned investors (Option 3 might be suitable)?
* **Your existing content:** Does your existing content cover other related topics? If so, Option 3 is good, as it provides context.

Choose the description that best fits the tone and scope of your WordPress blog and the target audience!