Unbiased Expectations Theory One$-$year Treasury bills currently earn $4\mathrm{.}70$ percent. You expect that one year from now, one$-$year Treasury bill rates will increase to $4\mathrm{.}85$ percent. If the unbiased expectations theory is correct, what should the current rate be on two$-$year Treasury securities$?$

Multiple Choice

$4\mathrm{.}8500\%$

$9\mathrm{.}5500\%$

$4\mathrm{.}7750\%$

$4\mathrm{.}7000\%$