{ "tool_id": "art-357-basel-2023-vs-2026-capital-delta-comparator", "note": "Basel 2023-vs-2026 capital-delta comparator (BT-3). Vector 1: mixed book, net relief directional across every bucket. Vector 2: single flat-RW bucket + zero business_indicator, NO_CHANGE / zero-op-risk edge case. Vector 3: unrecognized asset_class defaults conservatively, finite (no NaN/Infinity).", "vectors": [ { "name": "net_relief_typical_book", "description": "Mixed residential/corporate/retail book, both years relief-directional (2026 RWs lower across board).", "policy_parameters": { "exposures": [ { "asset_class": "residential_mortgage_low_ltv", "amount": 5000000 }, { "asset_class": "corporate_investment_grade", "amount": 3000000 }, { "asset_class": "retail_other", "amount": 2000000 }, { "asset_class": "off_balance_sheet_commitment", "amount": 1000000 } ], "business_indicator": 800000 }, "output_payload": { "portfolio_summary": [ { "asset_class": "residential_mortgage_low_ltv", "amount": 5000000, "rw_2023": 0.4, "rw_2026": 0.2, "rwa_2023": 2000000, "rwa_2026": 1000000 }, { "asset_class": "corporate_investment_grade", "amount": 3000000, "rw_2023": 0.65, "rw_2026": 0.5, "rwa_2023": 1950000, "rwa_2026": 1500000 }, { "asset_class": "retail_other", "amount": 2000000, "rw_2023": 1, "rw_2026": 0.85, "rwa_2023": 2000000, "rwa_2026": 1700000 }, { "asset_class": "off_balance_sheet_commitment", "amount": 1000000, "rw_2023": 0.75, "rw_2026": 0.4, "rwa_2023": 750000, "rwa_2026": 400000 } ], "credit_rwa_2023": 6700000, "credit_rwa_2026": 4600000, "business_indicator": 800000, "op_capital_2023": 96000, "op_capital_2026": 72000, "op_rwa_2023": 1200000, "op_rwa_2026": 900000, "total_rwa_2023": 7900000, "total_rwa_2026": 5500000, "total_capital_2023": 632000, "total_capital_2026": 440000, "delta_rwa": -2400000, "delta_capital": -192000, "delta_capital_pct": -0.3037974683544304, "direction": "NET_RELIEF_2026_VS_2023", "unrecognized_asset_class": false, "rule_status": "proposed", "constants_version": "BASEL-2023-VS-2026-DELTA-2026-07-17-V1", "source": "Basel III Endgame 2023 NPR (88 Fed. Reg. 64028, 2023-09-18) vs 2026 reproposal (three NPRs, 2026-03-19, comments closed 2026-06-18) -- representative credit-risk RW buckets + simplified operational-risk SMA business-indicator coefficient (BI <=1bn bucket, ILM neutralized both years pending US-variant confirmation). rule_status: proposed.", "referenced_tool_ids": { "erba_2026": "compute_rwa_erba_2026", "oprisk_sma_2026": "compute_oprisk_sma_2026" }, "disambiguation": "compare_basel_2023_vs_2026 is a representative-bucket credit + operational-risk capital-delta comparator, NOT an exhaustive regulatory RWA engine. rule_status:\"proposed\" -- final rule expected ~Q4 2026; this tool will be re-pinned at finalization. It does NOT replace compute_rwa_erba_2026 (art-355, exposure-level ERBA) or compute_oprisk_sma_2026 (art-356, full SMA) for production-grade single-rule-set computation." }, "golden_hash": "917d14d8784d011a2eb3b10e3229decf032c4743bc0b2ee5ed884c0f052d66b8" }, { "name": "no_change_flat_retail_revolving_only", "description": "Single retail_revolving bucket where rw_2023 == rw_2026 (0.75 both years) and zero business_indicator -- exercises the NO_CHANGE / zero-op-risk path.", "policy_parameters": { "exposures": [ { "asset_class": "retail_revolving", "amount": 4000000 } ], "business_indicator": 0 }, "output_payload": { "portfolio_summary": [ { "asset_class": "retail_revolving", "amount": 4000000, "rw_2023": 0.75, "rw_2026": 0.75, "rwa_2023": 3000000, "rwa_2026": 3000000 } ], "credit_rwa_2023": 3000000, "credit_rwa_2026": 3000000, "business_indicator": 0, "op_capital_2023": 0, "op_capital_2026": 0, "op_rwa_2023": 0, "op_rwa_2026": 0, "total_rwa_2023": 3000000, "total_rwa_2026": 3000000, "total_capital_2023": 240000, "total_capital_2026": 240000, "delta_rwa": 0, "delta_capital": 0, "delta_capital_pct": 0, "direction": "NO_CHANGE", "unrecognized_asset_class": false, "rule_status": "proposed", "constants_version": "BASEL-2023-VS-2026-DELTA-2026-07-17-V1", "source": "Basel III Endgame 2023 NPR (88 Fed. Reg. 64028, 2023-09-18) vs 2026 reproposal (three NPRs, 2026-03-19, comments closed 2026-06-18) -- representative credit-risk RW buckets + simplified operational-risk SMA business-indicator coefficient (BI <=1bn bucket, ILM neutralized both years pending US-variant confirmation). rule_status: proposed.", "referenced_tool_ids": { "erba_2026": "compute_rwa_erba_2026", "oprisk_sma_2026": "compute_oprisk_sma_2026" }, "disambiguation": "compare_basel_2023_vs_2026 is a representative-bucket credit + operational-risk capital-delta comparator, NOT an exhaustive regulatory RWA engine. rule_status:\"proposed\" -- final rule expected ~Q4 2026; this tool will be re-pinned at finalization. It does NOT replace compute_rwa_erba_2026 (art-355, exposure-level ERBA) or compute_oprisk_sma_2026 (art-356, full SMA) for production-grade single-rule-set computation." }, "golden_hash": "c7664f73d86710e3413db3bdae0b1df5218502867fa2728481b5beb2e97314f0" }, { "name": "unrecognized_asset_class_finite", "description": "Unknown asset_class string defaults to conservative RW=1.00 both years, finite (no NaN/Infinity), flags unrecognized_asset_class.", "policy_parameters": { "exposures": [ { "asset_class": "exotic_derivative_book", "amount": 1500000 }, { "asset_class": "corporate_unrated", "amount": 2500000 } ], "business_indicator": 300000 }, "output_payload": { "portfolio_summary": [ { "asset_class": "exotic_derivative_book", "amount": 1500000, "rw_2023": 1, "rw_2026": 1, "rwa_2023": 1500000, "rwa_2026": 1500000 }, { "asset_class": "corporate_unrated", "amount": 2500000, "rw_2023": 1, "rw_2026": 0.85, "rwa_2023": 2500000, "rwa_2026": 2125000 } ], "credit_rwa_2023": 4000000, "credit_rwa_2026": 3625000, "business_indicator": 300000, "op_capital_2023": 36000, "op_capital_2026": 27000, "op_rwa_2023": 450000, "op_rwa_2026": 337500, "total_rwa_2023": 4450000, "total_rwa_2026": 3962500, "total_capital_2023": 356000, "total_capital_2026": 317000, "delta_rwa": -487500, "delta_capital": -39000, "delta_capital_pct": -0.10955056179775281, "direction": "NET_RELIEF_2026_VS_2023", "unrecognized_asset_class": true, "rule_status": "proposed", "constants_version": "BASEL-2023-VS-2026-DELTA-2026-07-17-V1", "source": "Basel III Endgame 2023 NPR (88 Fed. Reg. 64028, 2023-09-18) vs 2026 reproposal (three NPRs, 2026-03-19, comments closed 2026-06-18) -- representative credit-risk RW buckets + simplified operational-risk SMA business-indicator coefficient (BI <=1bn bucket, ILM neutralized both years pending US-variant confirmation). rule_status: proposed.", "referenced_tool_ids": { "erba_2026": "compute_rwa_erba_2026", "oprisk_sma_2026": "compute_oprisk_sma_2026" }, "disambiguation": "compare_basel_2023_vs_2026 is a representative-bucket credit + operational-risk capital-delta comparator, NOT an exhaustive regulatory RWA engine. rule_status:\"proposed\" -- final rule expected ~Q4 2026; this tool will be re-pinned at finalization. It does NOT replace compute_rwa_erba_2026 (art-355, exposure-level ERBA) or compute_oprisk_sma_2026 (art-356, full SMA) for production-grade single-rule-set computation." }, "golden_hash": "caca2098f447d69e2a1d9c3f03e86cdd2673c58383176541679a96b233bcf54e" } ] }