Change in Interest Rate
Treasury bill rates have been used as proxy of Interest rate. Change in
interest rate has been measured by using log difference to T bill rates.
Change in Interest Rate = ln (TBt / TBt-1)
Burmeister and MacElroy (1988) study the relationship between short term
interest rates and equity market return.
It is hypothesized that an increase in interest rate is negatively related to
equity market returns