Originally posted by unclebutcher:
for those who have done macro, why when the US Fed Reserve cut its interest rates then all the stocks went up? what is the implication of an interest rate cut/ rise?
I guess you have been actively following the papers regarding the sub-prime mortgage defaults leading to a full-blown credit crunch with far reaching repercussions across asia and the whole world, leading to an initial cut in the "Federal Discount Rate" and followed by a cut in the "Federal Interest Rate" or "Federal Funds Rate" by 50 basis points (0.50%).
In this case, your question is referring to the "Federal Funds Rate".
Before answering that question, you have to understand the point whereby banks have to place a certain amount of funds with the central bank in order to meet the banking regulatory requirements of the country. The Federal Funds Rate is therefore the interest rate at which the Feds allow its member banks (consisting of the US's depositary institutions) to make overnight loans to each other, using the reserve that they initially placed with the Feds.
A cut or rise in the Federal Funds Rate determines the monetary policy that the Feds implement and subsequently the entire economical outlook of the USA. In this case, a cut in the Federal Funds Rate stimulates more inter-bank borrowing as the interest rate is lower and leads to increase in liquidity to make for investments. In view of the recent sub prime mortgage fallout, it also serves to mitigate the credit crunch facing the US interbank loans market as there is currently an "adverse selection" scenario playing out where banks are adverse to making loans to one another for fear that the respective parties have sub-prime mortgage defaults that may undermine the loans.
Likewise, a cut in the Federal Funds Rate is all fine and dandy as it stimulates economical growth but the Feds risk pushing the economy into overdrive if the interest rate is left unchecked. A repercussion of an overdriven, overheating economy would be Inflation, whereby the real price of assets, equities, commodities, property and even living expenses get "artificially" pushed up. This can be a real problem as inflation will undermine the average consumers average propensity to consume as their disposable income decreases and limits the amount of foreign investments, leading to a drop economical growth the GDP.
As government economist, it would therefore be in the Fed's best interest to maintain the tricky balancing act of stimulating growth and reigning in inflation at the same time through the tweaking of the Federal Funds Rate.