Set out the ways an equity manager can divide up the universe of investable shares

Managers split the equity universe along several axes. Size and style put companies into large, mid and small caps and into value, growth or core, usually using measures such as price-to-book, earnings growth and dividend yield. Geography groups markets as developed, emerging or frontier, which also signals differences in liquidity, governance and currency risk. Economic activity groups firms by sector and industry, using either a production-based or a market-based classification. Many managers add ESG screens as a further lens. The chosen segmentation shapes the benchmark, peer group and risk controls. A common trap is forgetting that style labels drift: a growth stock can become value as its price falls, so style exposure must be monitored.