Where did the fee go?

Explore a one-rebalance, dollar-holding optimizer. The browser recomputes a linear-cost self-financing ledger: fees reduce investable cash and are also accounted for in after-cost expected gain. This is a synthetic teaching fixture, not a broker quote.

Controls

Scenario Fee multiplier: 1.00×

Scales the synthetic buy/sell rates; the horizon remains per-rebalance.

Solver iterations: 600 Reduced motion / deterministic transitions

Step reveals validation, gradient, projection, and certification snapshots. It does not pretend that four labels are four solver iterations.

1 Validate2 Optimize3 Ledger4 Certify

—after-cost objective (USD)

—direct cost (USD)

—budget residual (USD)

Coordinate	Current x⁰	Returned x	Signed trade