Other fungible commodities include sweet crude oil, company shares, bonds, other precious metals, and currencies. Fungible shipments are products commingled with other quantities of the same product specifications. Most cryptocurrency tokens are fungible and interchangeable. Creating instruments that are not fungible (exchangeable) could introduce instability and make pricing difficult. Equivalent in this context means "fungible", i.e. the securities have to be completely interchangeable. Cryptocurrencies are usually considered to be fungible assets, where one coin is equivalent to another. Segregated batches preserve a fuel property not allowed in the fungible specifications. Under the indirect holding system, securities are held through fungible accounts (omnibus accounts). Most investors prefer their money to be in cash rather than in less fungible investments. Fungible things do not have to be money, though. Sindhu is the founder and CEO of data center technology company Fungible. Specific rules are provided for certain categories of more fungible expenses, such as interest. When a company decides to cross-list, the stock is "technically" fungible between exchanges. An ISIN uniquely identifies a fungible security. It is fungible, with a low spread between the prices to buy and sell.