Alternative Data and NLP in Quant Strategies › The Economics of Alternative Data

Understanding why alternative data can generate alpha requires connecting it to the framework of market efficiency we've encountered throughout this book. Markets incorporate publicly available information into prices, but the process isn't instantaneous. Alternative data creates value through several mechanisms.

Information timing advantage occurs when alternative data reveals fundamentals ahead of traditional reporting. Credit card spending data might indicate that a retailer's same-store sales declined three weeks before the quarterly earnings call. Early access lets you position before the market prices in this information.

Information granularity advantage emerges when aggregate figures mask important variations. A satellite image showing packed parking lots at some locations but empty ones at others provides insight that a national sales figure obscures. This granularity enables more precise forecasting.

Information creation happens when data reveals something not captured in any traditional source. Social media sentiment about a product launch, patent filing patterns suggesting R&D direction, and job posting trends indicating strategic shifts represent new information that complements financial statements.

The economics also explain why alternative data edges tend to decay. As more funds adopt a dataset, its insights become priced into markets more quickly. The first fund to use satellite parking lot data had months of edge. By the time a dozen funds subscribe to the same imagery service, the informational advantage has compressed to hours or disappeared entirely. This decay creates a perpetual search for new data sources and new analytical techniques: a data arms race that favors well-resourced quantitative operations.