1. Business
August 11, 2020

Responding to the siren call of alt data requires a cautious approach

By GlobalData Technology

Alternative data, or alt data, can indicate new trends much faster than conventional data, say proponents. But it comes with a warning label: experts only.

The future first presents itself like the “odd event you can’t get out of your mind [that] could be a weak signal of a distant industry-disrupting S curve…” said Paul Saffo, the renowned technology forecaster. The dawning of new trends might be described as being “like a string hanging down from the future,” said Saffo. Everyone’s on the lookout for that weak but portentous S-curve.

The trouble, of course, is the abundance of those hanging strings. The great challenge is to distinguish the strings that have real prescience. That’s true in ordinary times, but it’s far more important during upheavals like Covid and the shaky economy to follow. Alt data customers say standard financial indicators and statistical releases are too slow.

Business is booming for alt data vendors

Some hedge funds seem to be attempting such refinement. They are big clients for the relatively new industry that sells alt data. Among the nearly 1,500 alt-data vendors, business is booming. Hundreds of data sets offer options such as sentiment data on financial markets based on Twitter and StockTwits; web traffic data from company IP addresses to watch research topics by employees; and natural language processing (NLP) to analyze news, press releases, and financial social media.

Alt data, they say, detected the economy’s collapse much earlier than conventional data and, they hope, will be faster to detect any recovery. Indicators have included comparisons of social media posts in China with government statements to gauge the virus’s impact.

Listening beyond the noise that annoys

Doubters of alt data’s value complain that the signal to noise ratio is prohibitive. But to a savvy data analyst, noise only prompts another question, “What patterns in this noise can I find?” Doubters complain that the data’s more likely to be corrupt, but good data analysts always stay alert for that.

Even very noisy data can pose the previously mentioned “odd event you can’t get out of your mind,” as Saffo put it.  You may recall, possibly far in your past, a visit to a storefront psychic. She gazed into her big glass orb, then up at you with a knowing look she’d perfected over decades to give you advice she gave to everyone. It was all quite a show. But even so, you still couldn’t shake one thing she said that day even though you forgot everything else she said.

The odd event persists whether it’s from a fortune teller, a movie, or an overheard remark. The odd outlier on a chart may also persist and beg to be explored for verification or rejection.

Whether the data is conventional or “alt,” it’s subject to human judgment. The choice is not either to abandon alt data in favor of strictly conventional data nor to embrace it with abandon. Alt data can be used, but only when backed by domain knowledge that helps to know when a ringing in the ear has real meaning.

Like so many other powerful tools, alt data and conventional data can be used to great effect but only with a warning, “For use by domain experts or expert data analysts only; may cause undue distress or foolish optimism.”