A stock has monthly returns of $-2\mathrm{.}15\%,2\mathrm{.}12\%,0\mathrm{.}04\%,$ and $-0\mathrm{.}33\%.$ What is the stock's geometric average return? Please write your answer as a percentage $($e$.$g$.\mathrm{.}1234$ should be written as $12\mathrm{.}34).$