Your portfolio contains two stocks, A and B. You own 169 shares of Stock A; its current price is $33.95, its current beta is 1.04 and its return volatility is 19.82%. You own 227 shares of Stock B; its current price is $46.51, its current beta is 1.11, and its return volatility is 25.88%. The correlation between the returns of A and B is 0.16. Moreover, the current risk-free rate is 2.93% and the current market risk premium is 4.5%.
What is the standard deviation of your portfolio?
Express your answer as a percentage rounded to two decimal places (e.g., 11.25% not 0.1125).