Know Your Concentration Risk Before Your Next Shipment

Enter your warehouse values → get Herfindahl index, dollar-at-risk per site, and exact rebalance targets in 10 seconds. No login, formulas shown.

Warehouse Name Inventory Value

All calculations run in your browser. Data never leaves this page.

What Your Score Means

Market concentration measure. 0.15 = well diversified. 0.5 = risky. 1.0 = all eggs in one basket.

Tells you if you're flying blind or have true spread.

Color-coded thresholds: Low <0.15, Medium 0.15–0.25, High 0.25–0.5, Extreme >0.5.

Instantly know if your next shipment must prioritize diversification.

If your largest warehouse is lost, this is the dollar hit.

Quantifies your worst-case scenario in real money.

Equal-value distribution across all sites. Green = send stock here. Red = reduce stock here.

Gives you exact shipment allocation numbers for your next decision.

HHI = Σ (warehouse_value / total_value)²

Sum of squared market shares. Lower = better diversified.

Max Loss = max(warehouse_values)

The value of your largest single warehouse.

Target = total_value / warehouse_count

Equal allocation if perfectly diversified.

Move = target - current_value

Positive = add inventory. Negative = reduce inventory.

HHI Range	Risk Level	Interpretation	Action
`<0.10`	Very Low	Well diversified	Maintain
`0.10–0.15`	Low	Good spread	Minor tweaks
`0.15–0.25`	Medium	Some concentration	Plan rebalance next shipment
`0.25–0.50`	High	Vulnerable to single-site loss	Prioritize diversification
`>0.50`	Extreme	Critical risk	Urgent rebalance needed