Investing
Fidelity 500 Index Fund: Low-Cost S&P 500 Investing
Updated: 8/14/2026
TrendScope score
How strong this topic is right now — based on demand, growth, buyer intent, and competition.
60
Buyer intent
70
Growth
56
Competition
50
SEO potential
63
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Frequently asked questions
FXAIX is a mutual fund that tracks the S&P 500, giving you exposure to 500 large-cap U.S. stocks. It has an expense ratio of 0.015%, making it one of the cheapest index funds available.
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