Q15, run 2026-11-04-1712-sonnet

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What was Halden Bank's rating on 1 January 2026?

Tests: Time: the downgrade came later in 2026.

Expected: rating = A-

✅ R1 csv run 1 graded by code

A-. E10 was assigned A- (A26) and not downgraded until 2026-04-15 (A27). E17 is the same LEI.

JSON: {"rating": "A-"}

✅ R1 csv run 2 graded by code

A-. E10 was rated A- from A26, and the downgrade in A27 came on 2026-04-15.

JSON: {"rating": "A-"}

✅ R1 csv run 3 graded by code

A-. A26 applied until the downgrade in A27 on 2026-04-15.

JSON: {"rating": "A-"}

✅ R1 csv run 4 graded by code

A-. A26 gave E10 A- from 2023, and the downgrade in A27 came on 2026-04-15.

JSON: {"rating": "A-"}

✅ R1 csv run 5 graded by code

A-. E10 was assigned A- in 2023 (A26) and downgraded only in April 2026 (A27). E17 is a duplicate of E10, as it shares the same LEI.

JSON: {"rating": "A-"}

✅ R10 executed run 1 graded by code

A- (A26, in force until 2026-04-15).

JSON: {"rating": "A-"}

✅ R10 executed run 2 graded by code

A- (A26, in force until 2026-04-15).

JSON: {"rating": "A-"}

✅ R10 executed run 3 graded by code

A-. E10's rating on 1 Jan 2026 was A- (A26), before the April downgrade.

JSON: {"rating": "A-"}

✅ R10 executed run 4 graded by code

A- (E10, A26).

JSON: {"rating": "A-"}

✅ R10 executed run 5 graded by code

A- (A26, valid until 2026-04-15).

JSON: {"rating": "A-"}