The Systematic GARP Screener Blueprint: Uncovering High-ROIC Compounders at a Discount
Verify Peter Lynch PEG, trailing P/E, and margin of safety against benchmark multiples.
1. The Multi-Factor Screener Architecture
A low PEG ratio alone is not sufficient to construct an institutional equity portfolio. A cyclical commodity producer at the peak of a supercycle may exhibit an artificially low PEG of 0.40 due to temporary windfall profits that will rapidly vanish.
To isolate true durable compounders from cyclical traps, a robust GARP screening algorithm layers four non-negotiable quantitative filters:
PEG / PEGY < 1.0
Ensures you never overpay for expansion. Trailing P/E must be strictly less than projected 3-5 year EPS growth rate.
ROIC > 15%
Return on Invested Capital must substantially exceed Weighted Average Cost of Capital (WACC), proving economic moat durability.
Piotroski F-Score ≥ 7
Verifies operational efficiency, margin expansion, positive cash flow from operations exceeding net income, and stable leverage.
Net Debt / EBITDA < 2.5x
Guarantees the enterprise can service interest expenses easily across recessions and rising interest rate environments.
2. The Power of ROIC in Compounding
As Charlie Munger famously remarked: "Over the long term, it's hard for a stock to earn a much better return than the business which underlies it earns. If the business earns 6% on capital over 40 years... you're not going to make much different than a 6% return."
When a company re-invests retained earnings at a 20% ROIC year after year, intrinsic value compounds exponentially. When paired with a purchase multiple where PEG < 1.0, investors capture dual alpha engines:
- Organic Earnings Growth: EPS expands at 15% to 25% per year driven by reinvested retained profits.
- Multiple Expansion: The market eventually recognizes the high quality of the business and re-rates the P/E from 16x up to 24x, delivering bonus capital appreciation.
3. Implementation: Automated Institutional Execution
Conducting this four-tier audit manually across thousands of SEC 10-K filings is time prohibitive. Systematic asset allocators rely on programmatic screeners with normalized multi-decade financial restatements to instantly identify the top 1% of global compounders matching the GARP criteria.
Arthur writes about Peter Lynch valuation principles, ROIC moat analysis, and financial data modeling for self-directed investors.