portfolio pumpingglossary / PORTFOLIO-PUMPING portfolio-pumping. Securities. The practice of purchasing additional shares of a stock near the end of a fiscal period in an attempt to improve an investment fund’s apparent performance. — Also termed window-dressing. 词条贡献者 译者Mathew,国际知名法学院国际仲裁与争端解决专业,擅长翻译各种与美国国内仲裁相关的法律文件。