Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 313

The DOI matches its Crossref record; 12 of the 12 references it cites were found in a registry or an index.

Correlations in economic time series

Open access
Liu, Yanhui, Cizeau, Pierre, Meyer, Martin, Peng, C.-K., Eugene Stanley, H.·1997·Physica A: Statistical Mechanics and its Applications

Abstract

A financial index of the New York stock exchange, the S&P500, is analyzed at 1 min intervals over the 13 yr period, January 84–December 96. We quantify the correlations of the absolute values of the index increment. We find that these correlations can be described by two different power laws with a crossover time tx ∼ 600 min. Detrended fluctuation analysis gives exponents α1 = 0.66 and α2 = 0.93 for t < tx and t > tx, respectively. Power spectrum analysis gives corresponding exponents β1 = 0.31 and β2 = 0.90 for f > fx and f < fx, respectively.

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.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/s0378-4371(97)00368-3

Cites

12 of 12 references verified0 citation errors · 0 not checkable

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.

A few free checks a day · papers already verified open instantly · results are public

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

Show all 12 references

Cited by

See all 313

Metadata

Authors
Liu, Y., Cizeau, P., Meyer, M., Peng, C.-K., & Eugene Stanley, H.
Venue
Physica A: Statistical Mechanics and its Applications
Publisher
Elsevier BV
Published
1997-11
Volume
245
Issue
3-4
Pages
437-440
ISSN
0378-4371 (ISSN-L)
OpenAlex
W2111417375
Cited by
313
References
12
FWCI
34.52
Type
journal article
Language
en
Open access
hybrid

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: Correlations in economic time series. https://app.cochat.ai/papers/10.1016/s0378-4371(97)00368-3
The paper
Liu, Y., Cizeau, P., Meyer, M., Peng, C.-K., & Eugene Stanley, H. (1997). Correlations in economic time series. Physica A: Statistical Mechanics and its Applications. https://doi.org/10.1016/s0378-4371(97)00368-3

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.