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the claim

Index funds lose value during stock market downturns.

the verdict
INSUFFICIENT LEANING
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Index funds lose value during stock market downturns?

Unclear. The retrieved items only partially bear on the claim: two papers report a negative correlation between index fund flows and S&P returns, and two studies document that broad market indices (South African sector indices, India's Nifty 50) can suffer sharp losses during downturns. None directly measures whether index funds lose value in market downturns.

Verdict: PARTIAL LEAN · 4 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 4
1998
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Massa, M. & Goetzmann, W. N. (1998). Index Funds and Stock Market Growth. doi.org. https://doi.org/10.2139/ssrn.125470

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More for · 3
1999
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Goetzmann, W. N. & Massa, M. (1999). Index Funds and Stock Market Growth. nber.org. https://www.nber.org/papers/w7033

2025
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Jakata, O. & Chikobvu, D. (2025). Modelling Financial Risk in the South African Stock Market: An Application of the Generalised Extreme Value Distribution (GEVD). doi.org. https://doi.org/10.33119/erfin.2025.10.2.1

2026
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Sharma, S., Gupta, C., Malhotra, R., Johari, A., Sayal, A., & Gupta, S. K. (2026). Volatility and Monthly Patterns in the Indian Stock Market: An Empirical Study of the Nifty 50. doi.org. https://doi.org/10.1109/ICIPTM69057.2026.11465824

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