"Stock market" refers to a market used for trading equities such as the New York Stock Exchange. The term is also used to refer to organized trading of stocks through exchanges and over the counter.
"Floating interest rate" is a rate that goes up and down with the condition of the general market or an index. This interest rate amount is usually set at, above or below a specified rate index. The floating interest rate then moves in relation to the specified rate index. Floating interest rates are often indexed to the prime rate of a lending institution, the federal funds rate, or other money market rates.