To determine Beta $($$),$ the following regression is run over the trailing $60-120$ months:$$

ret

i$,$t

$=$

b

$0$

$+$

b

$1$

Ret

S&P$,$t

reti,t$=$b$0+$b$1$RetS&P$,$t $.$ In this regression, what is the dependent variable?

Multiple Choice

b

$0$

b$0$

ret

i$,$t

reti,t

b

$1$

b$1$

Ret

S&P$,$t