Symbols for AMEX stocks are always 3 letters. There may be added characters, to denote classes other than common stock.
Multiple "Classes" - Some stocks have Multiple "Classes", such as Class A or Class B. These classes are represented with a period '.' followed by the class letter.
Preferred Stocks have a trailing hyphen '-' , followed by optional "class" letters.
A unique four or five letter symbol assigned to a Nasdaq security. If a fifth letter appears, it identifies the issue as other than a single issue of common stock or capital stock. The fifth letter is never an 'X', to avoid naming conflicts with Mutual and Money Market Funds.
Fifth-letter identifiers and a brief description of what each represents:
L - Miscellaneous situations, such as depositary receipts, stubs, additional warrants, and units
M - Fourth preferred, same company
N - Third preferred, same company
O - Second preferred, same company
P - First preferred, same company
Q - Bankruptcy Proceedings
R - Rights
S - Shares of beneficial interest
T - With warrants or with rights
U - Units
V - When-issued and when distributed
W - Warrants
Y- ADR (American Depositary Receipt)
Z - Miscellaneous situations such as depositary receipts, stubs, additional warrants, and units.
* The letter "C" as a fifth character in a security symbol, indicates that the issuer has been granted a continuance in Nasdaq under an exception to the qualification standards for a limited period.