Building Theme Portfolios from Company and Supplier Business Overlap
Summary
The document presents a process for identifying stocks linked to an investment theme using company business classifications and supplier relationships. It starts with leading firms tied to the theme, finds their shared business activities and common suppliers, and combines those activities into a theme definition. Listed companies that match at least one activity form an initial portfolio, which can then be filtered further.
Its 5G example combines activities associated with network infrastructure, phones, and chips, then removes special-treatment stocks and firms with low 5G revenue exposure. For the period through October 31, 2019, it reports cumulative returns of 63.1% for an equal-weight portfolio and 67.3% for one weighted by revenue share, compared with 23.7% for a communications index and 35.1% for a 5G concept index. These figures describe a single favorable period and do not establish durable outperformance. The framework may also miss cross-industry technologies such as cloud computing, for which business overlap and supplier data may be insufficient.
Key ideas
- The framework defines a theme by combining business activities shared by leading firms and their common suppliers.
- Companies matching at least one defined activity enter an initial portfolio, which is refined with additional filters.
- The 5G example covers infrastructure, phones, and chips, then filters for listing status and revenue exposure.
- The document reports stronger 2019 returns for its two 5G portfolios than for the cited comparison indexes.
- Supply-chain and industry classifications may be inadequate for themes that span many industries.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.