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Short seller report

🚨 Trust
▼ Usually bearish

An activist short seller publishes research alleging fraud, accounting manipulation, or misrepresentation.

Typical size

5-30% on the day

Timeframe

Immediate; the overhang lasts until claims are settled

Evidence

2 logged events

Why it moves the price

Introduces the possibility that the reported numbers are wrong. Since the valuation is built entirely on those numbers, doubt about their integrity compresses the multiple immediately.

What separates a good call from a naive one

The question is whether the report has verifiable new evidence or just reframes known concerns. The company response is the tell: a detailed rebuttal with data tends to restore the price, while a generic 'short and distort' statement without specifics usually precedes further decline.

Measured impact

Not enough evidence yet

Every logged event is measured against real closing prices: the move from the close before the event, compared with the S&P 500 over the same window.

Next day

-11.30%

Median
-11.30%
Moved up
0% of 2
vs S&P 500
-10.80%

After 1 week

-24.44%

Median
-24.44%
Moved up
0% of 2
vs S&P 500
-23.33%

After 1 month

-36.89%

Median
-36.89%
Moved up
0% of 2
vs S&P 500
-38.00%
Textbook view:▼ Usually bearishtypically 5-30% on the day

No measured verdict yet — 2 events logged. Three or more are needed before the data says anything useful.

The evidence (2)

Every row is a real event, measured against actual closing prices.

DateStockWhat happenedNext day1 week1 monthvs S&P
Aug 27, 2024SMCI

Hindenburg Research published accounting allegations

-2.64%-21.46%-18.55%-2.78%
May 2, 2023IEP

Hindenburg Research questioned the fund's asset valuations and dividend

-19.95%-27.41%-55.24%-18.83%

Measured from historical closing prices. Past reactions do not guarantee future ones. Not financial advice.