Greenbrier Companies' high beta suggests exaggerated price movements, providing a potential buying opportunity in a bearish market. Higher cash flow is expected in the near-term future, potentially leading to a higher share valuation. However, consider other factors like financial health before investing.

The recent insider purchase of Greenbrier Companies shares may be seen as encouraging, but the lack of sustained enthusiasm from insiders gives reason for caution. However, insiders' decent ownership of shares suggests a reasonable degree of alignment with other shareholders.

Investors retain shares of Greenbrier Companies despite high P/E ratio, banking on its promising earnings outlook. Strong investor sentiment could maintain share price, barring any changes in conditions.