Concentration risk is the central quantitative discipline of MCA portfolio management. The Herfindahl-Hirschman Index (HHI) — the sum of squared market shares × 10,000 — is the industry-standard measure, borrowed from antitrust and adopted by securitization rating agencies.
The 2026 HHI bands by dimension. - State HHI: - Diversified (good): 800–1,400. - Moderate: 1,400–2,000. - Concentrated (warning): 2,000–2,500. - High-risk (covenant breach territory): > 2,500. - Industry HHI (NAICS-2): - Diversified: 1,000–1,800. - Concentrated: 1,800–2,500. - Specialist-funder territory (acceptable but priced wider): 2,500–4,000. - Single-merchant HHI: - Diversified (any large $100M+ book): 200–600. - Concentrated (small-funder or jumbo-ticket book): 1,000–3,000.
Why concentration risk is the binding constraint in 2026. - Warehouse-line covenants: Cross River, Pacific Western, MidCap Financial covenants typically require state HHI < 2,200 and industry HHI < 2,800. Breach triggers a 10–15% advance-rate cut. - Securitization rating-agency criteria: Kroll, DBRS, and S&P each have published MCA concentration limits for AAA tranches — typically single-obligor exposure < 0.5%, top-20 obligors < 10%, single-state < 18%. - Stress test outcomes: a 2× default rate stress on a concentrated book (HHI > 2,500) typically erodes 60–80% of subordinated tranche equity; same stress on diversified book (HHI < 1,500) erodes 25–40%.
The 2026 concentration-risk control stack. 1. Origination guardrails: decisioning engine declines / reprices any new advance that would push HHI past trigger. 2. Daily portfolio monitoring: treasury team tracks HHI movement daily; reports to credit committee weekly. 3. Syndication overflow: when industry or state hits cap, new originations get syndicated to ISOs or other funders to free up balance-sheet room. 4. Quarterly stress testing: every funder with > $50M outstanding runs at least a quarterly stress with 1.5×, 2×, and 3× default scenarios.
Concentration risk vs. correlation risk. HHI measures concentration (how big any single exposure is); correlation measures how those exposures move together. Two FL restaurants are concentrated by state AND highly correlated by industry — their joint default probability is much higher than independent. Sophisticated 2026 funders use stressed HHI (HHI weighted by industry-state default correlation) as their internal metric; raw HHI under-states the true risk.
Typical 2026 concentration breaches. - 2024 trucking spike: funders with > 25% trucking saw HHI rise above 3,500 industry-only; many breached warehouse covenants. Resolution: 18-month rebalancing via paydown + syndication. - 2025 Florida hurricane season: funders with > 22% FL concentration saw collections drop 30–40% for 60 days; concentrated funders triggered margin calls. - Cannabis specialist funders: intentionally run industry HHI > 5,000; rated below investment grade by all major agencies; cost of capital 400–600 bps higher than diversified funders.
Common confusions. - "Low HHI = low risk." Not always — a book of 1,000 trucking merchants spread across 30 states still has 100% industry correlation. - "HHI is point-in-time." Modern funders track HHI velocity (rate of change), not just level — fast-rising concentration is the early warning sign.
The takeaway for 2026. Concentration discipline is the single best predictor of which funders survive multi-cycle stress. Funders that built robust real-time HHI monitoring in 2022–23 outperformed by 300–500 bps in 2024–25 stress. Expect rating agencies to publish more granular MCA concentration criteria through 2026–27, further institutionalizing the discipline.
Related terms
- MCA funder portfolio concentration risk (2026) — MCA funders manage concentration risk by capping single-industry exposure at 15–25%, single-state at 20–30%, single-merchant at 1–2%, and total broker concentration at 10–15% of portfolio.
- MCA funder portfolio concentration risk (detailed) — MCA funder portfolio concentration risk has four primary dimensions: industry concentration (typically capped at 20–25%), geographic concentration (15–20% per state), broker concentration (5–10% per broker), and merchant size concentration.
- MCA funder portfolio diversification strategies — MCA funders diversify portfolios across industry (no sector >20% of book), geography (no state >25%), paper grade (40/40/20 A/B/C target), advance size (no single advance >2% of book), and origination channel (no ISO >10% of volume).
- MCA funder portfolio securitization trends — 2026 — 2026 MCA securitization saw $4.5–5.5B in new issuance (up 35% YoY); AAA tranches priced SOFR +180–230 bps; subordinate tranches +400–700 bps; Enova/OnDeck, Bluevine, Credibly, Mulligan led issuance. (Updated 2026-06-28.)
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