The US Dollar is represented by the currency symbol $. This symbol is used to denote the value of the American currency in international financial transactions. It is a widely recognized symbol, known for its horizontal line through the letter "S" to represent stability and strength. As a professor of finance, it is important to understand and recognize currency symbols, as they play a crucial role in the global economy. By understanding the significance of this symbol, we gain a deeper understanding of the US Dollar and its impact on the world of finance.