In the short run, lower real interest rates in the U.S. also tend to reduce the foreign exchange value of the dollar, which lowers the prices of the U.S.-produced goods we sell abroad and raises the prices we pay for foreign-produced goods. This leads to higher aggregate spending on goods and services produced in the U.S.
The increase in aggregate demand for the economy’s output through these different channels leads firms to raise production and employment, which in turn increases business spending on capital goods even further by making greater demands on existing factory capacity. It also boosts consumption further because of the income gains that result from the higher level of economic output.