Nowcasting Company Fundamentals
Nowcasting uses fast-arriving alternative data to estimate a company's current-quarter revenue or earnings before the company itself reports it, trading the certainty of an official number for weeks of lead time.
Prerequisites: Sourcing and Vetting Alternative Data
A company reports earnings once a quarter. Between reports, the market has to guess how the business is actually doing, and that guess drives the stock price for the entire three months in between. Nowcasting is the practice of using data that arrives continuously — credit card spending, web traffic, app downloads, shipping records — to build a running, updated estimate of a company's current-quarter results well before the company announces them itself.
Nowcasting turns a quarterly, backward-looking number (reported revenue) into a continuously updated, forward-looking estimate, built from data that arrives daily or weekly instead of every three months — trading some accuracy for a large head start.
What goes into a nowcast
A typical company nowcast blends several fast-moving proxies for the same underlying business: consumer transaction panels for a retailer's sales, web traffic and app download trends for an online business's user growth, satellite imagery of parking lots or shipping activity for physical retail or logistics, and job postings for a company's hiring pace as a proxy for expansion. None of these individually is as accurate as the company's own accounting, but combined and updated daily, they let an analyst track a rough trajectory for the quarter while it is still happening, rather than waiting for the single reported number at the end.
Worked example
A retailer's fiscal quarter runs January through March. By late February, a credit card panel already shows spending running 8% above the same weeks last year, and web traffic to the company's site is up a similar amount. An analyst combines these into a nowcast suggesting current-quarter revenue growth of roughly 7-9% year over year — several weeks before the company reports its actual results in April. If the eventual reported number comes in at 8.5% growth, the nowcast was directionally right and let the analyst act on that view a month earlier than the rest of the market that waited for the official report.
What this means in practice
A nowcast is a probabilistic estimate, not a preview of the real number, and it is built from proxies that can each be individually noisy or biased — which is why serious nowcasting blends multiple independent data sources rather than betting on any single one. The value is entirely in the lead time: if a nowcast is only ever as accurate as waiting for the earnings report, but arrives weeks earlier, it can still be valuable for trading, even with more uncertainty attached to it than the eventual official number will have.
A nowcast's real test is not "was it exactly right" but "did it correctly signal the direction and rough magnitude of the surprise relative to what the market was already pricing in" — being early and roughly right beats being on time and precise.
Further reading
- Federal Reserve Bank of New York and Atlanta Fed 'nowcasting' methodology notes (adapted to company-level use)