If you’re an investor, you no doubt pay a great deal of attention to your stocks, bonds and mutual funds. But you shouldn’t forget another key element of your financial strategy: cash.

Cash is part of any financial strategy and investment portfolio, but how much have you thought about the different uses of cash, and how much you really need? Consider these four key purposes: Unexpected expenses and emergencies – If you face an interruption in employment, you need an extensive home repair or...