{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GGDWL7XJPHJCAJAJTMWBYV4OYK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f270a99ed3ad17f2a710c689b6c306b831464bc85df2a880a1d5c8d6b86e2cb3","cross_cats_sorted":["q-fin.MF","q-fin.RM","q-fin.ST","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2026-05-13T04:15:24Z","title_canon_sha256":"5984a06f587793f72e17fe20789a6abefd4e66eb3f29edf9ecb493bf71eda85e"},"schema_version":"1.0","source":{"id":"2605.12977","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.12977","created_at":"2026-05-18T03:09:08Z"},{"alias_kind":"arxiv_version","alias_value":"2605.12977v1","created_at":"2026-05-18T03:09:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.12977","created_at":"2026-05-18T03:09:08Z"},{"alias_kind":"pith_short_12","alias_value":"GGDWL7XJPHJC","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"GGDWL7XJPHJCAJAJ","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"GGDWL7XJ","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:4fd4919f4540f8272b2115107bef864c2c1f0bfa89988037bf823757eccf9940","target":"graph","created_at":"2026-05-18T03:09:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Estimating the covariance of asset returns, i.e., the risk model, is a key component of financial portfolio construction and evaluation. Most risk modeling approaches produce a factor model that decomposes the asset variability into two components: the first attributed to a small number of factors that are common among the assets and the second attributed to the idiosyncratic behavior of each asset. Third-party providers typically provide risk models to investors, and while these models are typically of high quality, they may fail to capture important information, e.g., changing market regimes","authors_text":"Alexandros E. Tzikas, Emmanuel J. Cand\\`es, Mykel J. Kochenderfer, Ronald N. Kahn, Stephen P. Boyd, Trevor Hastie","cross_cats":["q-fin.MF","q-fin.RM","q-fin.ST","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2026-05-13T04:15:24Z","title":"Enhancing a Risk Model by Adding Transient Statistical Factors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.12977","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:cfe6aa9b57d5044e4677bb90c9fb685d9abcd10d76b9ec8bf715ad7d668bd574","target":"record","created_at":"2026-05-18T03:09:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f270a99ed3ad17f2a710c689b6c306b831464bc85df2a880a1d5c8d6b86e2cb3","cross_cats_sorted":["q-fin.MF","q-fin.RM","q-fin.ST","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2026-05-13T04:15:24Z","title_canon_sha256":"5984a06f587793f72e17fe20789a6abefd4e66eb3f29edf9ecb493bf71eda85e"},"schema_version":"1.0","source":{"id":"2605.12977","kind":"arxiv","version":1}},"canonical_sha256":"318765fee979d22024099b2c1c578ec292d17b8253e3e772c8b00e7b9bdfa544","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"318765fee979d22024099b2c1c578ec292d17b8253e3e772c8b00e7b9bdfa544","first_computed_at":"2026-05-18T03:09:08.698295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:09:08.698295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SF+qCY5yZQG9gG+uSbiveJ6QEpNkSqNM+RH0RS/+O7R7mTHkQ4SwLEwEYnvroKcKJHjRjZq/R9wbXnrmwGxpAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:09:08.699065Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.12977","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfe6aa9b57d5044e4677bb90c9fb685d9abcd10d76b9ec8bf715ad7d668bd574","sha256:4fd4919f4540f8272b2115107bef864c2c1f0bfa89988037bf823757eccf9940"],"state_sha256":"abf241fa816666cb2c79aacc823383205e9b5d50d0856028632f60b7ec13faaa"}