Fundamentally, VLISX's price, or Net Asset Value (NAV), fluctuates based on the underlying value of its holdings.

Market Performance: Overall stock market trends, particularly in the US, significantly influence VLISX as it invests in US equities.

Sector Performance: Performance of specific sectors that VLISX is heavily invested in impacts its returns.

Interest Rates: Rising interest rates can make bonds more attractive, potentially leading to a decrease in equity valuations.

Economic Data: Economic indicators like GDP growth, inflation, and unemployment rates affect investor sentiment and market performance.

Company Performance: The performance of individual companies within VLISX's portfolio directly impacts the fund's value.

Investor Sentiment: General investor optimism or pessimism can drive buying or selling pressure, influencing VLISX's price.

Fund Flows: Large inflows or outflows of money into or out of VLISX can temporarily affect its NAV.

Management Decisions: The fund manager's investment strategies and stock-picking abilities play a crucial role.

Expense Ratio: The fund's expense ratio, although relatively stable, impacts the overall return to investors.

Global Events: Major global events, such as geopolitical tensions or economic crises, can affect market volatility and VLISX's price.