Earnings Report: Price Moves on the Surprise
An earnings report is a company's announcement of its results for a period, usually a press release filed with the regulator and followed by a call. Share prices react to the difference between the figures and what was expected, not to the figures themselves.
How it works
Three things happen close together. A press release with the headline figures, a filing that attaches it, and a conference call with analysts, usually the same day.
The reaction is to the gap between the result and what was expected. A company reporting record profit can fall sharply if the record was smaller than the market had assumed, and that is not irrational — the expectation was already in the price.
“Consensus” is an average of published analyst estimates, and the published set is not the whole market. There is also a working expectation among active participants — sometimes called the whisper — that can differ from the consensus, and a result can beat one and miss the other.
Which is why a stock occasionally falls on a beat with no visible explanation. The number exceeded the published average and not what the people trading it were positioned for.
The number in the headline is usually adjusted
Press releases lead with adjusted earnings, excluding items the company considers unusual. Consensus estimates are compiled on the same adjusted basis, so the comparison is internally consistent and both sides of it are defined by the companies being measured.
The statutory figure is in the filing and is frequently lower. Comparing the two, and watching whether the gap grows year after year, is a short check with a decent record of identifying companies whose “unusual” items are annual.
And the guidance usually matters more. A quarter is history; the outlook is what the price is discounting. Beat on the quarter and cut the year, and the shares fall — which looks contradictory in a headline and is not.
In practice: it is a scheduled event
The date is published in advance, so the risk is known. A stock that moves 2% on a normal day can move several times that on results day, and both the direction and the size are unknowable while the timing is not.
A stop does not protect against it. Results are announced outside trading hours, the stock reopens past the stop level, and the fill is at the open — so the loss is set by the gap rather than by the level you chose.
Which means holding through results is a decision about position size, not about stop placement. The options are: close before, size for the event, or accept an uncapped outcome. The one thing that does not work is a normal position with a normal stop.
Trading around the announcement pays the round trip like any other trade, and the spread immediately after a release is at its widest, so the cost peaks exactly when the urge to act does.
One more asymmetry is worth naming: results season concentrates risk. Most companies in a sector report within the same two or three weeks, so a portfolio of related holdings faces several scheduled events in quick succession rather than one.
Which changes the arithmetic of position sizing at the portfolio level rather than the trade level. Three positions each sized comfortably for a single event are collectively exposed to three of them inside a fortnight, and the correlation between them is highest exactly when a sector-wide theme is what moves all three. The calendar is published months in advance, which makes it one of the few risks that can be managed entirely by looking something up.
What an earnings report is not
It is not the full accounts. The 10-Q or annual filing contains those.
It is not audited at the point of announcement. The press release precedes the reviewed filing.
It is not a statutory figure by default. The headline is usually adjusted.
And it is not a surprise in timing. Only in content.
How this connects
The release is filed as an 8-K, and the adjusted headline usually sits beside a reconciliation to the statutory income statement.
Read revenue and gross margin before the profit line. Growth that comes with shrinking margins is a different quarter from growth that expands them, even at identical earnings.
EBITDA is the favorite adjusted figure because it removes depreciation, and the cash flow statement is the check on whether the profit turned into money.
Most releases arrive in pre-market or after hours trading, which is why the reaction appears as an opening gap rather than a move during the session.
Options price the event in advance. Implied volatility climbs before the date and a vol crush follows once the numbers are out, which is why a straddle can lose even after a large move.
The dates sit alongside macro releases on an economic calendar, and a sector ETF often moves on the first large company in the group to report.
And the year’s version is the annual report, which adds the full statements and notes.
When it fails
Not deciding is still deciding. A position held through results because the date was not checked carries the same risk as one held deliberately, without the sizing that should have gone with it.
The second failure is trading the number rather than the expectation. Whether a result is good is a question about the business; whether the price rises is a question about what was already assumed.
A third is ignoring the guidance. The forward statement is frequently the larger part of the move.
A fourth is comparing adjusted figures across companies. Each company defines its own adjustments.
And a fifth is reacting in the first minutes. Spreads are at their widest, the call has not happened, and the guidance may not have been read by anyone yet — including the people trading it.
The original data
Of the 24,971 trading and investing videos in this site’s corpus, 3 have “guidance” in the title at a median of 160 views. “Earnings” alone returns 23 videos at a median of 2,286. The relative strength index (“RSI”) supplies the contrast: 594 videos of its own, at a median of 5,377 views apiece. Every figure counts each video a single time.
Three videos on guidance, at a median of 160 views, in a corpus where one oscillator has 594. That is the sharpest illustration in the whole dataset of what the available material covers: the forward statement that moves prices most on the most-watched day of a company’s quarter is effectively undiscussed. The practical consequence is a single rule that costs nothing: check the earnings date before taking a position, and size for it or exit before it — because the date is published, the risk is known, and the only thing that makes it a surprise is not having looked.
Related
Earnings call is the discussion that follows the release. Earnings guidance is the forward statement that usually matters more. And 10-Q is the filing containing the full statements the release summarizes.
The strongest argument against holding through earnings is not about odds. Position size is chosen for ordinary days and the event has a different distribution, so holding through it takes a risk you have never actually sized.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.