Vantage research · September 2026 · finance
What AI cites for “is an index fund a good investment”
ChatGPT cited no answer, Gemini cited 0 sites, Perplexity cited 10 sites. No site was cited by all three.
Updated monthlyNext edition 1 October 2026
ChatGPTGeminiPerplexity dots beside a site: the other engines that cite it too
ChatGPT
no answer
No answer could be measured this month.
Gemini
0 sites · opens with a sentence · no table · opening 57 words
Answered from what the model already knows: no sites cited.
Perplexity
10 sites · opens with a sentence · no table · opening 22 words
- investopedia.com
- morningstar.com
- investor.vanguard.com
- investor.gov
- cnbc.com
- ig.com
- expat.hsbc.com
- robinhood.com
- fidelity.com
- schwab.com
Is your site one of them?
Ask your AI agent to run Vantage's check_prompt_coverage for your domain and “is an index fund a good investment”, on all
three engines, and it will tell you whether you are cited, who is instead, and what changed since your last check.
More finance questions
Each engine was asked once, in English, as from the United States, on 2026-09-23. Answers change from run to run, so read this as a snapshot. Download the data.