Numbers tell you where to look, not what to conclude
A screen is a starting point, never an answer. Ratios raise questions about a business; only understanding the business answers them.
Screens and ratios are useful and frequently misused. They are efficient at narrowing a universe and telling you where something interesting might be. They are incapable of telling you whether it actually is - because every ratio is a summary, and summaries discard the context that determines the answer.
Every ratio is a question in disguise
A high return on capital asks: is this durable, or a good year? A low valuation asks: is this cheap, or is the market right about a problem? Rising receivables ask: is this growth, or a collection issue? The number is the prompt. The research is what follows it.
The trap of the cheap screen
Screening for low multiples reliably surfaces businesses that are cheap for good reasons - structural decline, cyclical peak earnings, governance problems. Statistical cheapness without understanding is one of the more expensive habits available to an investor.
Where quantitative work genuinely helps
Numbers are at their best across time and across peers: a decade of margins, cash conversion and returns on capital for a company and its competitors will tell you a great deal about which businesses are actually good. That is a different use from screening for a single flattering ratio today.
Got a question on what you have just read - on bottom-up research, quality investing, or the Category III AIF structure? Write directly to the office. These essays are general views only, not investment advice.
A research-led equity investor with over twenty years in the Indian markets. Designated Partner of Stonebridge Advisors LLP, Investment Manager of Anchor Rock Investment Fund - I, a SEBI-registered Category III AIF.