What does "semistrong" mean?

Of or relating to a form of the Efficient-market hypothesis that implies that share prices adjust to publicly available new information very rapidly and in an unbiased fashion, such that no excess returns can be earned by trading on that information.

Semistrong

adj

adj ·Rare ·Advanced level

Definitions

Adjective

1
Of or relating to a form of the Efficient-market hypothesis that implies that share prices adjust to publicly available new information very rapidly and in an unbiased fashion, such that no excess returns can be earned by trading on that information. not-comparable

Etymology

From semi- + strong.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.