「情報を制する者は世界を制す」をモットーに様々な情報を提供することを目指すブログです。現在はプログラミング関連情報が多めですが、投資関連情報も取り扱っていきたいです。

# ディクテーションの実例293 決定係数について

もし聞き間違えている部分を見付けたら、コメントで教えてくださるととてもありがたいです。

in finance, r-squared or coefficient of determination is a statistical tool that measures the degree to which a security or portfolio's performance can be attributed to the performance of a particular benchmark index. r-squared does not quantify the performance of the portfolio itself. instead, it shows the correlation that exists between the performance of the portfolio and that of the benchmark index. r-squared is measured on a scale of 1 to 100. the higher the value, the more the portfolio's performance patterns can be explained by the performance of the relevant index. an r-squared value of 100 indicates that all movements of a security are completely explained by movements in the index. r-squared values between 70 and 100 indicate a strong correlation between the returns of the portfolio and the benchmark index. values below 70 indicate a medium to weak correlation. a security with an r-squared of 90 means that 90% of the security's price movement is explained by the index's movement. this allows the investor to evaluate the relative performance of the portfolio and predict how the portfolio may perform ? the future when compared against the broader market. for example, if ? seeks a portfolio whose performance is strongly correlated to the s&p, she would look for a portfolio with a high q-squared value to the s&p. if there were three potential stocks a, b, and c with r-squared values of 85, 90 and 45 respectively, then ? would choose only a and b to include in her portfolio. r-squared values can be plotted as a technical indicator on a price chart.

• coefficient of determination・・・決定係数
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