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The yield curve is one of the most and best used instruments in the global macro investors arsenal. The yield curve is usually thought of as a bond traders tool but good global macro trader know better. You can use the yield curve to trade bonds, stocks, currencies, and really just about anything that affects the economy, heck you can even use to for refinancing your home.

So what is the Treasury yield curve? It is the curve you get when you plot out the yields on different maturities of Treasury securities. For instance if you take the ninety day Treasury bill, the two year Treasury bill, five year Treasury note, ten year Treasury bond, and the thirty year Treasury bond you will get a curve. Usually sloping upwards from the bottom left to the upper right of the plot area, it can also take several other shapes. It can be very inverted with the far right down at the bottom and the far left at the top, it can have seemingly random lumps, and it can shift anywhere on the plot area. Each of these shapes and slopes of the yield curve tell the global macro investor something differently about the economy and the different trading instruments available to you.

This is great but how do you use it to make money? Well the global macro investor knows that if the curve is sloped from the lower left to the upper right that things are looking good for the economy. If on the other hand it is sloping downwards the Fed has tightened and the economy is or will be slowing.

You may be asking yourself why this is. The reasons are actually fairly simple and straightforward. If the curve is steep, meaning the short term rates are low and the long term rates are high it means that banks are lending as they are able to borrow short term from the Fed and charge long term rates to their customers. Obviously when business is good for the banks, they will be lending as much as they can. This in turn spurs new business spending as money is available.

If the curve is inverted however business is usually about to slow down, rates will be lowered, and bonds will climb. This is because with the incentive of the banks to lend now gone they will throttle back and the spigots of available money run dry. In turn this forces the Fed to lower short term rates, the Fed Fund rate, in order to spur business growth once again. When they lower rates bonds inevitably go up.

Bonds and rates are like a piece of wood straddled on a log. If you sit at one end the other end goes up. If bonds are at one end yields are at the other. When yields go down bonds go up and vice versa. This is almost always the case, especially in an inflation environment.

So anytime that you see either of these events happen the global macro investor can start to look for an entry point to either buy or to sell bonds and stocks. If the curve is inverted then you will likely want to start buying bonds and selling stocks as the act of lowering rates will cause bonds to go up. After bonds have gone up and it looks like the Fed is done lowering rates it is worthwhile to look at stocks as the next beneficiary of the rate cuts as businesses can now borrow cheaper and therefore expand faster.

Neither of these relationships works perfect every time so it is important to still use risk controls. In fact if you had gone long stocks in 2008 when they lowered rates you would have lost a lot of money, but more often then not this trade and the concept behind it work well. Look at the yield curve, learn from it, and apply it to your market forecasting toolbox.