{"artifact_id":"L1-443","layer":"L1","title":"Merton Credit Risk Structural Model","domain":"Computational Finance","sub_domain":"Credit risk","physics_fingerprint":{"L_DAG":2.5,"title":"Merton Credit Risk Structural Model","domain":"Computational Finance","carrier":"N/A","primitives":["N.pointwise","O.newton.system_2eq","S.bs.equity_as_call"],"sub_domain":"Credit risk","noise_model":"market_gaussian","problem_class":"nonlinear_inverse","solution_space":"firm_value_vol_vector","difficulty_delta":5,"integration_axis":"capital_structure","sensing_mechanism":"equity_option_credit_inversion"},"observable_profile":{"metric":"CDS_spread_prediction_RMSE_bp","regime":"Existence of the recovered firm_value_vol_vector is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 80); debt_complexity_multiple_tranches dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Market gaussian sets the irreducible data-fidelity floor.","secondary":"PD_calibration_error"},"size_tiers":{"center_spec":{"omega":{"T_maturity_yr":1.0,"r_rate_percent":3.0,"sigma_E_percent":30,"leverage_ratio_D_V":0.5},"input_format":"measurement_only","problem_class":"nonlinear_inverse","forward_operator":"equity_option_credit_inversion","epsilon_fn_center":"50 CDS_spread_prediction_RMSE_bp"},"omega_bounds":{"T_maturity_yr":[0.25,5.0],"r_rate_percent":[0.0,10.0],"sigma_E_percent":[5,100],"leverage_ratio_D_V":[0.1,0.9]},"epsilon_bounds":{"CDS_spread_prediction_RMSE_bp":[5,500]},"allowed_problem_classes":["nonlinear_inverse"],"allowed_omega_dimensions":["leverage_ratio_D_V","sigma_E_percent","T_maturity_yr","r_rate_percent"],"allowed_forward_operators":["equity_option_credit_inversion"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":2000,"metric":"CDS_spread_prediction_RMSE_bp"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x2efbf5051bb03d694a44a5906b3b18354043018770aedc0550d58bc5aec228af","chain_tx_hash":"0x20a563530bc0c6f554d0d41d28074f54c77904246206bfe74a1de96a2afb6141","chain_block":41555259}