but you can get higher returns by putting your money in various investments. Asset classes help consumers group different types of investments based on their similarities. For instance ...

Not even Warren Buffett -- arguably the greatest stock investor of our time -- puts all his money into stocks. Image source: Getty Images. That's where asset allocation comes into play.

Change in money market fund assets is primarily driven by flows and can be used as a proxy for net new cash flows. ICI reports money market fund assets to the Federal Reserve each week.