Wow, very complex.. I'd say that it mostly affects higher price items that are obviously linked to the interest rate, like house buying.. From there, it's a trickle down domino effect, and it gets very complex.. I guess you could say it affects everything in the economy, because once house prices go up from the interest rates going up, then that affects the construction industry (negatively), and that diminished buying power affects other industries, etc., etc.,. Also when the interest rate goes up, there's more money to be made in safer investments like bonds, so less money is invested that ends up into the hands of businesses and entrepenuers, and this can spark recession.. During the end of the Carter administration recession, people were earning around 21% by just stashing their money, so why would they risk it on the stock market?