[THE INVESTOR] On Sept. 9, Hyosung (004800) rose 1.16% to 131,000 (US$ 119.27). It had declined 8.63% through the past month. Standard deviation, the variableness index, was 2.1% over the same period over one month.Compared with its close competitors within the same industry, KOSPI, as the monthly volatility of Hyosung was relatively expand, the stock price was stay at a low level with decline. Over the recent month, the return-on-risk, the return on investment with consideration about risk, was