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L’incidence de la vente à découvert sur les réactions du marchéà la publication des résultats

2010· article· fr· W1589327897 on OpenAlexvenueno aff
Dennis J. Lasser, Wang Xue, Yan Zhang

Bibliographic record

VenueContemporary Accounting Research · 2010
Typearticle
Languagefr
FieldBusiness, Management and Accounting
TopicAuditing, Earnings Management, Governance
Canadian institutionsnot available
Fundersnot available
KeywordsPolitical scienceHumanitiesPhilosophy

Abstract

fetched live from OpenAlex

Les auteurs examinent l’incidence de la demande inhérente que supposent les positions courtes en étudiant dans quelle mesure les réactions des cours boursiers à la publication des résultats dépendent du niveau des positions courtes. Selon leurs constatations, si les nouvelles publiées sont extrêmement positives ou extrêmement négatives, la demande inhérente entraîne à la hausse le cours des actions à proximité de la date de la publication des résultats, la hausse étant plus prononcée dans le cas des nouvelles positives que des nouvelles négatives. Plus précisément, la réaction initiale du marchéà des résultats imprévus extrêmement positifs est plus importante dans le cas d’entreprises ayant des niveaux élevés de positions à découvert. En revanche, lorsque les résultats imprévus sont extrêmement négatifs, la réaction initiale du marché est moins négative dans le cas d’entreprises dont le niveau des positions à découvert est élevé. Les auteurs constatent au surplus que l’ampleur du mouvement réactif suivant la publication des résultats est plus modeste (plus marquée) dans le cas de résultats imprévus extrêmement positifs (négatifs) pour les entreprises dont les positions à découvert sont importantes.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.032
metaresearch head score (Gemma)0.121
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.032
Threshold uncertainty score0.167

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0320.121
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.002
Bibliometrics0.0020.002
Science and technology studies0.0010.002
Scholarly communication0.0040.002
Open science0.0010.002
Research integrity0.0020.003
Insufficient payload (model declined to judge)0.0140.002

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.039
GPT teacher head0.304
Teacher spread0.265 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2010
Admission routes1
Has abstractyes

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