JPMorgan Chase
JPMorgan Chase disclosed that a cyberattack compromised contact information associated with 76 million households and 7 million businesses.
+2.8% JPM vs +3.7% SPY
This site shows how share prices moved after an incident became public. It does not prove that the incident caused the move. Company news, sector moves and the wider market can affect every result. Educational only — not investment advice.
Disclosure timing
When could the market react?
The baseline is the last adjusted close before the news was public. The reaction session is the first close afterward.
- 01Baseline sessionOct 2, 2014
Normalized to 100 for both JPM and SPY.
- 02Public disclosureOct 2, 2014, 4:49 PM EDT
Documented publication time.
- 03First reaction closeOct 3, 2014
+2.5% company total return versus +1.1% for SPY; +1.4 pp market-relative return.
Time windows
Company vs SPY
Each row uses the last trading session on or before its target date. “Market-relative” is the company return minus the SPY return, in percentage points.
| Window | Endpoint | JPM | SPY | Market-relative | Signal |
|---|---|---|---|---|---|
| First reaction | Oct 3, 2014 | +2.5% | +1.1% | +1.4 pp | Above SPY |
| +7 days | Oct 9, 2014 | +0.4% | -0.8% | +1.3 pp | Above SPY |
| +1 month | Oct 31, 2014 | +2.8% | +3.7% | -1.0 pp | Below SPY |
| +3 months | Jan 2, 2015 | +6.9% | +6.3% | +0.6 pp | Above SPY |
| +6 months | Apr 2, 2015 | +4.2% | +7.3% | -3.1 pp | Below SPY |
| +12 months | Oct 2, 2015 | +6.1% | +2.3% | +3.8 pp | Above SPY |
Compare with current catalog aggregates
| Window | This case | Catalog median | Catalog mean | n |
|---|---|---|---|---|
| First reaction | +1.4 pp | -0.8 pp | -1.5 pp | 30 |
| +7 days | +1.3 pp | -2.0 pp | -4.0 pp | 30 |
| +1 month | -1.0 pp | -6.6 pp | -6.8 pp | 30 |
| +3 months | +0.6 pp | -5.1 pp | -6.6 pp | 30 |
| +6 months | -3.1 pp | -5.6 pp | -7.5 pp | 30 |
| +12 months | +3.8 pp | -3.7 pp | -10.1 pp | 30 |
Normalized total return
JPM compared with SPY
Baseline session = 100. Adjusted close reflects splits and reinvested distributions.
JPMorgan Chase had +6.1% company total return versus +2.3% for SPY; +3.8 pp market-relative return. The chart shows normalized adjusted-close performance for up to 24 months.
View tabular chart fallback
| Date | JPM | SPY |
|---|---|---|
| Oct 2, 2014 | 100.0 | 100.0 |
| Oct 31, 2014 | 102.8 | 103.7 |
| Dec 2, 2014 | 103.8 | 106.5 |
| Jan 2, 2015 | 106.9 | 106.3 |
| Feb 3, 2015 | 97.0 | 106.0 |
| Mar 5, 2015 | 106.0 | 108.9 |
| Apr 6, 2015 | 104.1 | 108.0 |
| May 5, 2015 | 110.9 | 108.5 |
| Jun 4, 2015 | 114.2 | 109.2 |
| Jul 6, 2015 | 116.7 | 107.9 |
| Aug 4, 2015 | 118.6 | 109.3 |
| Sep 2, 2015 | 108.4 | 102.0 |
| Oct 2, 2015 | 106.1 | 102.3 |
| Nov 2, 2015 | 114.4 | 110.4 |
| Dec 2, 2015 | 116.4 | 109.4 |
| Jan 4, 2016 | 111.8 | 106.1 |
| Feb 3, 2016 | 100.9 | 101.0 |
| Mar 4, 2016 | 105.5 | 105.8 |
| Apr 5, 2016 | 103.3 | 108.4 |
| May 4, 2016 | 109.0 | 108.8 |
| Jun 3, 2016 | 114.4 | 111.6 |
| Jul 5, 2016 | 106.2 | 111.2 |
| Aug 3, 2016 | 115.4 | 115.3 |
| Sep 1, 2016 | 119.9 | 116.0 |
| Sep 30, 2016 | 118.8 | 116.0 |
Price recovery
No initial drop
Here, recovery only means that adjusted close reached the baseline again. It does not mean every effect of the incident ended.
- State
- No initial drop
- Initial trough
- +0.4% on Oct 9, 2014
- Recovery close
- Not applicable / not observed
- Calendar days
- —
- Observation cap
- 24 months after disclosure
Hypothetical $1,000
What would $1,000 have looked like?
Compare $1,000 in JPM with $1,000 in SPY, bought and measured on the same dates.
Entry Oct 6, 2014 Exit Apr 6, 2015
Uses fractional shares and adjusted close. Leaves out taxes, fees and slippage. The holding period starts on the purchase date. This is a historical illustration, not an investment strategy.
Case note
JPMorgan Chase told customers and investors that contact information and internal information relating to approximately 76 million households and 7 million small businesses had been compromised. It said it had not found evidence that core account credentials or Social Security numbers were exposed.
The SEC accepted the filing at 4:49 p.m. EDT, after the regular session. The October 2 close therefore remains the baseline and October 3 is the first reaction session. The observation does not attribute later returns solely to the incident.
Evidence
Sources and case review
We qualify each case before checking its price results. These links support the disclosure date, listing, incident and business impact.
- primary Oct 2, 2014JPMorgan Chase October 2, 2014 Form 8-K filing detail JPMorgan Chase / U.S. SEC Supports: Disclosure, Timing, Listing, Impact, Description
- Listing evidenceChecked Jul 20, 2026JPMorgan Chase October 2, 2014 Form 8-K U.S. Securities and Exchange Commission The event-period filing detail identifies the issuer and records SEC acceptance at 4:49 p.m. EDT.
Why it is included. The issuer directly suffered the attack and filed a market disclosure quantifying a very large household and small-business population, meeting the systemic-reach threshold. Reviewed Jul 20, 2026.