# 調整供應－銷毀幣天數｜Supply-Adjusted CDD

## 指標概念

調整供應 CDD 說明了總供應量的幣天數累積對代幣銷毀天數指標的影響。

隨著更多硬幣的發行和整體網絡累積的硬幣天數越來越多，銷毀的幣天數的下限將隨著時間的推移而增加。 這導致 CDD 的底部值穩定上升，並可能出現更高的高點，因此需要在分析中額外考慮。&#x20;

為何需要調整供應？

* &#x20;在幣天數循環的早期，硬幣供應量很小，總累積幣天數週期也是如此，因此所需的調整更大，以根據最近的值進行擴展。&#x20;
* 在幣天數循環的後期，硬幣供應量更大，總累積幣天數週期也更大，因此所需的調整相對於最近的值更小。&#x20;

一般來說，供應調整指標中的值以及水準可能會隨著時間的推移比調整前的基本指標更一致。

![圖片來源：glassnode](https://lh6.googleusercontent.com/YvEqf_YPtksr8J9cYt_l233xkYmT3SC7dBbaF-0rYMcBX4cgo7zOW-KnorF-tDCQ1VevUy9Cc9fPxymLTNVyeEasBeiFd9IyY4A0BECzfyzntJTXU4A_PefcU-iFii0GOHcTi56J)

## 指標如何衡量、計算？

![](/files/ypRDIfUbUWeQ3m3SAgFK)


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