| X | Fifth letter of a Nasdaq stock symbol indicating that listing is a mutual fund. |
| X or XD | Symbol that indicating that stock is trading ex-dividend, with no dividend. |
| XAF | The ISO 4217 currency code for the CFA Franc. |
| XBA | The ISO 4217 currency code for the European Composite Unit (EURCO). |
| XBB | The ISO 4217 currency code for the European Monetary Unit (EMU). |
| XCD | The ISO 4217 currency code for the East Caribbean Dollar. |
| XDR | The ISO 4217 currency code for the Special Drawing Rights (SDR). |
| XEU | The ISO 4217 currency code for the European currency Unit (ECU). |
| XMI | Applies to derivative products. Quotron symbol for the Major Market Index (MMI). |
| XOF | The ISO 4217 currency code for the CFA Franc. |
| XPF | The ISO 4217 currency code for the CFP Franc. |
| XR | Symbol indicating that a stock is tradingex-rights, with no rights attached. |
| XW | Symbol indicating that a stock is trading ex-warrants, with no warrants attached. |
