What is our measure of the market? MWF didn't get to this so let's do some learning here want a way to track the market over time because we think market performance $=$ health of the economy $-$We can't actually track the market so we use a proxy $.-$What's the proxy? The S&P $500$ aka the value of $500$ major corporations tracked over time! NASDAQ S&P $500$ NYSE All of the items listed are measures of the market