Big Data: Updating Peter Lynch for the 21st Century


The following is the final in a series of three guest articles written by Tony Seker, Executive Vice President of Sales and Marketing at  Brand Loyalties tracks the loyalty of on-line consumers for certain brand names — and how that loyalty shifts over time. The firm gathers and analyzes the data of on-line consumers for the products of over 1,200 publicly traded corporations.

Over the past few weeks we have explored the recent “data scientist” hiring frenzy, where millions of dollars are being offered to people experienced with extracting actionable investment intelligence from “Big Data.” We examined at least two scenarios where profitable intelligence exists: 1) using social media to stay ahead of the news cycle; and 2) capturing consumer loyalty of the brand names owned by publicly traded corporations.

The first scenario (“staying ahead of the news cycle”) often requires making portfolio decisions in minutes, seconds or even milliseconds. The second scenario (“capturing consumer brand loyalty”) is a less frantic endeavor. It is essentially a 21st Century update to Peter Lynch’s early strategy for the Magellan Fund. One of Peter’s initial equity strategies involved selecting only those companies that he knew were selling products again and again to his family, co-workers and acquaintances – equities with so-call consumer brand loyalty.

Contemporary data scientists can data-mine “Big Data” to measure the fondness of on-line and social media consumers for certain brand names – and more critically, measure how that fondness (or consumer brand loyalty) changes over time. Whereas Peter Lynch was likely checking in with his meager ad-hoc focus group several times a year, a modern data scientist can track tens of thousands of brand names by observing millions of on-line consumer decisions on a daily basis.

The consumer brand loyalty scenario needs clever data scientists, but fortunately the time frames involved are measured in days – ultimately with an eye to anticipating quarterly revenues and earnings reports. In fact cleverness is more critical than the phenomenal data and communications resources available to the deepest pockets on Wall Street. This is where the money spent on Big Data scientists can be both necessary and sufficient to gain actionable investment intelligence.

Capturing consumer brand loyalty is, on the surface, a straight forward exercise. The less frantic time frames allow the counting of brand name citations while deferring to human analysts for final judgement on the sentiment or context behind any observed changes or spikes. The operational time frames allow equity analysts to interpret the metrics, just as they would any other form of fundamental data.

Big Data scientists still need to be exceptionally clever. Among the issues that they need to address are:

  • The brand names owned by a corporation change over time. Mapping brand names to their parent corporations is a major and ongoing task – which can be further complicated by corporate actions altering the corporate side of the map.
  • Many brand names are cited seasonally. Year over year analysis is critical, which must be done after normalizing for bandwidth driven fluctuations in sample sizes.
  • Event driven citations (e.g., Volkswagen and Samsung) must be identified and referred to analysts for interpretation.

Does capturing consumer brand loyalty work? It certainly worked for Peter Lynch, his shareholders, and ultimate for Fidelity Investments as well.

And are today’s Big Data scientists similarly worth millions? Over the past several years published reports (e.g., Davis, Richard C. “Big Data” Meets “Smart Beta”. Journal of Index Investing, Summer 2015, 39-50) have demonstrated significant and persistent “smart beta” excess returns using consumer brand loyalties as an investment tool.

The best data scientists are worth millions of dollars precisely because they know how to deal with all of these issues – all while gleaning actionable (and excess return generating) investment intelligence from Big Data.

For all of these reasons the data scientist hiring frenzy is likely to have legs.



About Author

Mike Mayhew is one of the leading experts on the investment research industry. In addition to founding Integrity Research, Mike is on the board of directors of Investorside Research Association, the non-profit trade association for the independent research industry, and a frequent speaker on research industry trends and developments. Mike has over thirty years of research industry experience. Email:

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