1 A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. 2  In a chemical reaction, the atoms and molecules that interact with each other are called reactants. 3  In a chemical reaction, the atoms and molecules produced by the reaction are called products.
FidelityÂ® Defined Maturity Funds. Defined Maturity Funds (DMFs) are an innovative way to invest in municipal bonds. Like Fidelity's other municipal bond funds, DMFs offer professional management, diversification, and seek to provide federally tax-exempt monthly income. They can also be sold at the end of each business day at their net asset value.
DEFINITION of 'Money Market Fund'. An investment whose objective is to earn interest for shareholders while maintaining a net asset value (NAV) of $1 per share. A money market fundâs portfolio is comprised of short-term (less than one year) securities representing high-quality, liquid debt and monetary instruments.Investors can purchase shares of money market funds through mutual funds, brokerage firms and banks. Next Up.EFINITION of 'Money Market Fund'. An investment whose objective is to earn interest for shareholders while maintaining a net asset value (NAV) of $1 per share. A money market fundâs portfolio is comprised of short-term (less than one year) securities representing high-quality, liquid debt and monetary instruments.