淨營運資金與公司價值的關聯性始終為公司經營決策的一重要方針，然而淨營運資金的多寡對公司價值的影響究竟為何?成為促使本研究的起因。在參酌Aktas et al. (2015)的研究，探討淨營運資金與公司價值之間的關係，並更加深入針對風險層面來做分析。考量營建產業與景氣波動之間具有極高的連動性，本文便採用台灣經濟新報社資料TEJ資料庫中1996-2016年上市、上櫃公司，樣本選取以營建產業為主，分析其超額報酬、報酬率標準差及夏普指數等指標，並以最小平方法(The Method of Least Square)，以迴歸分析求得近似的標準方法做為模型建構與估計的方式。 實證結果顯示，淨營運資金與超額報酬率、報酬率標準差均為顯著的負相關，此結果與Aktas et al. (2015)及Faulkender and Wang（2006）的研究結果相呼應。在景氣的部分，本研究發現景氣佳時超額報酬反而下滑，但風險亦同步下降。 ;The relationship between net working capital and company value has always been an important policy for the company′s business decisions. However, by how much the net working capital affects the company′s value has motivated this research. In the study of Aktas et al. (2015), the relationship between net working capital and corporate value was explored, and a deeper discussion was made on the risk aspect. Considering that there is a high degree of linkage between the construction industry and the fluctuations in the economy, this paper use the TEJ database of the Taiwan Economic News Agency, which will be listed in the TECO database from 1996 to 2016, and will be based on the construction industry and analyze the Excess Return、Standard Deviation of Return Rate and Sharpe Ratio etc., and using The Method of Least Square, the standard method for obtaining approximate solutions by regression analysis is used as a model construction and estimation method. Empirical results show that the net working capital is significantly negatively correlated with the Excess Returns and the standard deviation of returns. This result echoes the findings of Aktas et al. (2015) and Faukkender and Wang (2006). In the business climate, this study found that Excess Returns declined while the economy is booming, but the risks also dropped.