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Index front-running ahead of mandatory rebalancing pulls forward demand, causing stocks to decline after inclusion once mechanical buying pressure disappears.
ARTICLES1
SOURCES1
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FIRST SEENJul 7, 2026
LAST SEENJul 7, 2026
TRAJECTORY Quiet
Too little corroboration in the last 3 days to call a trend (1 article). Watching for it to gain traction.
COVERAGE OVER TIME
COVERAGE MIX
SOURCE EVIDENCE
"An analysis of 35 Nasdaq-100 additions since the start of 2022 found that only 12 of those stocks rose on their first day as an index member. The average change on day one was a loss of 1.13%. The average change over the first five trading days following inclusion was a loss of 3.41%."