Pinterest shares fell 7.2% in extended trading on Tuesday, sliding to $23.75 after the company paired a forecast-beating quarter with an outlook that gave investors little extra to cheer.
The drop wiped out a strong session, the stock having closed up 5.9% at $25.58 before the numbers landed.
The results themselves were solid.
Pinterest, the image-sharing platform that makes its money from advertising, reported adjusted earnings of 43 cents a share, ahead of the 36 cents analysts had expected.
Revenue came in at $1.18 billion, above the $1.15 billion forecast and up 18% from $998.2 million a year earlier.
Adjusted earnings of $311 million also topped projections of $270 million, a sign the advertising business is converting growth into profit.
The engagement figures pointed the same way.
Global monthly active users rose 11% to 640 million, beating estimates of 635 million, while average revenue per user reached $1.86, again ahead of forecasts.
"Our Q2 results reflect the scale and strength of our platform," chief executive Bill Ready said.
The line that spooked the market
The problem was the guidance, not the quarter just gone.
Pinterest said it expects current-quarter revenue of between $1.19 billion and $1.21 billion, a midpoint of $1.2 billion that merely matched what analysts already assumed.
For a stock that had climbed nearly 6% into the print, an in-line forecast was not enough, and the market treats "as expected" as a disappointment when it has priced in more.
The company added that the outlook assumes a modest headwind from foreign exchange at current rates, a caveat that trimmed any hope of an upside surprise.
That combination, a beat on the past and no upgrade to the future, is a familiar recipe for an after-hours sell-off.
A swing into the red
There was one figure that complicated the otherwise upbeat picture.
Despite the revenue growth, Pinterest posted a net loss of $47 million, or eight cents a share, for the period.
That compares with net income of $38.76 million, or six cents a share, in the same quarter last year, a reversal even as sales climbed.
The adjusted numbers strip that loss out, and investors tend to focus on them, but the swing underlines the gap between the profitability Pinterest reports for Wall Street and the figure at the bottom of its accounts.
The quarter showed a business still growing users and advertising revenue at a healthy clip.
The guidance showed why that was not enough, because after a run-up into results, matching expectations is the one thing a stock priced for acceleration cannot afford to do.
