S A Nasdaq stock symbol indicating shares of beneficial interest. Investopedia Says: Nasdaq-listed securities have four or five characters. If a fifth letter appears, it identifies the issue as other than a single issue of common stock or capital stock. Related Terms: Nasdaq Stock Symbol S A Nasdaq stock symbol indicating shares of beneficial interest. Investopedia Says: Nasdaq-listed securities have four or five characters. If a fifth letter appears, it identifies the issue as other than a single issue of common stock or capital stock. Related Terms: Nasdaq Stock Symbol |