The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
The Expiration of IPO Share Lockups
Open accessAbstract
We examine 1,948 share lockup agreements that prevent insiders from selling their shares in the period immediately after the IPO (typically 180 days). While lockups are in effect, there is little selling by insiders. When lockups expire, we find a permanent 40 percent increase in average trading volume, and a statistically prominent three‐day abnormal return of −1.5 percent. The abnormal return and volume are much larger when the firm is financed by venture capital, and we find that venture capitalists sell more aggressively than executives and other shareholders. We find limited support for several hypotheses that may explain the abnormal return, but no complete explanation.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Valuation effects of security offerings and the issuance process
Mikkelson, W. H., & Partch, M. M. (1986) · Journal of Financial Economics · doi:10.1016/0304-405x(86)90049-8 · Cited by 1,213
The role of venture capital in the creation of public companies
Barry, C. B., Muscarella, C. J., Peavy, J. W., & Vetsuypens, M. R. (1990) · Journal of Financial Economics · doi:10.1016/0304-405x(90)90064-7 · Cited by 1,167
Cited by
Initial Public Offerings: An Analysis of Theory and Practice
BRAU, J. C., & FAWCETT, S. E. (2006) · The Journal of Finance · doi:10.1111/j.1540-6261.2006.00840.x · Cited by 837
Economic Determinants of Audit Committee Independence
Klein, A. (2002) · The Accounting Review · doi:10.2308/accr.2002.77.2.435 · Cited by 624
A Review of IPO Activity, Pricing and Allocations
Ritter, J. R., & Welch, I. (2002) · SSRN Electronic Journal · doi:10.2139/ssrn.296393 · Cited by 466
Metadata
- Authors
- Field, L. C., & Hanka, G.
- Venue
- The Journal of Finance
- Publisher
- Wiley
- Published
- 2001-04
- Volume
- 56
- Issue
- 2
- Pages
- 471-500
- ISSN
- 0022-1082 (ISSN-L)
- 1540-6261
- OpenAlex
- W3124787240
- Cited by
- 496
- References
- 2
- FWCI
- 42.47
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: The Expiration of IPO Share Lockups. https://app.cochat.ai/papers/10.1111/0022-1082.00334
- The paper
- Field, L. C., & Hanka, G. (2001). The Expiration of IPO Share Lockups. The Journal of Finance. https://doi.org/10.1111/0022-1082.00334
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.