Economy: Strong economic growth usually leads to increased demand for financial services, benefiting Fidelity Select Brokerage & Investment Management Portfolio (FNSVRX.US) and potentially raising its price.

Interest Rates: Rising interest rates can affect financial service companies differently. Higher rates may increase profitability from lending but could also decrease investment activity, creating mixed effects on FNSVRX.US.

Market Sentiment: General investor optimism or pessimism towards financial markets can significantly influence the demand for financial service stocks, leading to price fluctuations in FNSVRX.US.

Regulatory Changes: New laws or regulations impacting the financial industry (e.g., banking rules, investment restrictions) can affect the profitability and operations of companies held by FNSVRX.US, consequently affecting its price.

Fund Performance: FNSVRX.US's own investment performance relative to its benchmark (e.g., S&P 500 Financials Sector Index) influences investor confidence and demand, thereby affecting its price.

Company Performance: The financial health and performance of individual companies held within FNSVRX.US (e.g., Goldman Sachs, Morgan Stanley) are key drivers of the fund's overall performance and price.

Management Expertise: The skill and experience of Fidelity's fund managers in selecting and managing investments within FNSVRX.US can significantly impact its returns and, consequently, its price.

Inflation: High inflation can erode the real value of investments, potentially reducing demand for financial assets and impacting FNSVRX.US's price.

Global Events: Geopolitical events or global economic crises can trigger market volatility and negatively affect the financial sector, leading to price declines in FNSVRX.US.