Money market fund
A fund holding very short term debt; near cash, small yield.
Where it is explained in full
When size changes the answer: ten dollars, ten thousand, and a hundred million are not the same money. Arithmetic scales in a straight line. The world does not. Past certain sizes, insurance runs out, prices move against you, rules change, and the cheap thing becomes expensive or the expensive thing becomes cheap. This page names the lines.
Workplace plans: the 401(k), the 403(b), and the TSP, from the first paycheck to the last. Everything a person needs to open one, fill it, hold the right things in it, avoid the traps, and carry it with them when they leave. Long on purpose, so that one page is enough.
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Words beside it
- Bear market
A fall of 20 percent or more from a high. They happen every few years and end every time so far.
- bond fund
A pool of money collected from many investors that a fund company uses to buy a large number of different bonds at once. You own a small slice of that whole pool instead of one single bond.
- Bull market
A long rise. Feels permanent from the inside.
- Emergency fund
Cash set aside for the unexpected, usually three to six months of expenses.
- fund
A pool where many investors put money together so a manager can buy a large collection of investments on everyone's behalf. You own a small slice of the whole pool rather than any single investment directly.
- In the money
An option with built in value: a call below the stock price, a put above it.
- Index fund
A fund that holds the components of a published index in the same proportions, changing only when the index does.
- market
The market is the overall system where buyers and sellers trade things like bonds and shares, and prices move up or down based on how many people want to buy or sell at any given moment. You do not visit it like a store but it shapes the price of almost every financial product you might own.
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