> For the complete documentation index, see [llms.txt](https://goldzip-1.gitbook.io/goldzip/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://goldzip-1.gitbook.io/goldzip/goldzip-xgz/physical-gold/backing-and-custody.md).

# Backing & Custody

* Backed by physical gold stored in licensed gold vaults accredited by HKGX
* GoldZip Eligible Gold Bars are assayed by internationally recognized standards to ensure 99.99% fineness before being deposited into the HKGX recognized depositories.
* Regular audits by accredited firms.