X-Efficiency

Economic efficiency in resource use, avoiding waste in firms or markets.

X-Mark Signature

Mark, like an "X," used by illiterate individuals to sign financial documents.

XBRL (eXtensible Business Reporting Language)

Standardized format for digital financial reporting, enhancing data transparency.

XCD (Eastern Caribbean Dollar)

Currency for eight Caribbean nations, pegged to the USD.

XD

Ex-dividend, stock trading without the right to the upcoming dividend.

Xenocurrency

Currency circulating or traded outside its country of origin, like USD abroad.

Xetra

Electronic trading platform of the Frankfurt Stock Exchange, for stocks and ETFs.

XML (Extensible Markup Language)

Data format used in financial systems for structured information exchange.

XRT

Ticker for SPDR S&P Retail ETF, tracking retail sector stocks.