VTI or VOO? They’re 88% the same fund
23 September 2026. “VTI vs VOO” is searched about 30,000 times a month, and the two funds overlap by 88%. We worked out the same number for 1,411 pairs of US funds from their own SEC filings, including the growth and dividend funds people most often hold together.
How the 13F consistency score works
15 September 2026. Every manager Vestiio ranks carries one number between 0 and 100. This is how it is computed from public 13F filings, with the weights, the thresholds and a worked example.
Rebuilding a year of portfolio history from a single day of holdings
9 September 2026. Most brokers hand over today’s positions and nothing else. We reconstruct the history instead, and measured it against a year of Interactive Brokers NAV to find out how close it gets.
Research ETFs and investment managers’ holdings in Claude and ChatGPT
1 October 2026. Connect Vestiio to Claude or ChatGPT to compare ETF holdings, see how much funds overlap and look up what well-known investment managers reported owning. Your assistant gets Vestiio’s published figures with dates and links, so you can check them.