> For the complete documentation index, see [llms.txt](https://docs.fiinquant.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fiinquant.vn/ham-va-cong-thuc/4.-thong-ke-thi-truong/4.2.-ham-do-rong-thi-truong-chung.md).

# 4.2. Hàm độ rộng thị trường (chung)

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