Berkshire Hathaway's financial performance: BRTHF mirrors Berkshire Hathaway's overall profitability. Strong earnings reports usually boost the stock price, while poor performance can negatively impact it.

Market sentiment towards value investing: BRTHF is seen as a value stock. Increased investor appetite for value investing can drive demand and price increases.

Interest rate environment: Rising interest rates can make bonds more attractive, potentially reducing the appeal of BRTHF.

Economic conditions: A strong economy generally supports BRTHF, while economic downturns can negatively affect its performance.

Warren Buffett's influence: Warren Buffett's leadership and decisions significantly impact BRTHF's stock price. Any news regarding his health or future plans can create volatility.

Major acquisitions or divestitures: Significant deals announced by Berkshire Hathaway can influence investor perception and the stock price.

Regulatory changes: Government regulations affecting Berkshire Hathaway's various businesses can impact the stock's value.

Overall market conditions: Broad market trends, such as bull or bear markets, will inevitably impact BRTHF, even if the underlying fundamentals remain strong.