Does strong breadth guarantee more gains?
No. It describes participation, not how long a direction will persist.
Separate a move led by a few large assets from participation across the market.
A few large assets can lift a capitalization-weighted index while most assets fall.
Venue, timestamp and eligible asset set must match before comparing advance and decline ratios.
Also ask whether participation is expanding or contracting quickly.
No. It describes participation, not how long a direction will persist.
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