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Without broker-tagged parent orders, we reconstruct metaorders from the anonymous tape and calibrate impact as $I/\\sigma_D = c\\,(Q/V_D)^{1/2}$ with the exponent fixed at the universal value $1/2$. We find $c_{\\rm raw} = 0.69$ (bias-corrected $c_{\\rm eff} = 0.34$), conditional impact tracking $Q^{1/2}$, and a size-distribution tail exponent $\\be"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2606.24019","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-fin.TR","submitted_at":"2026-06-22T23:52:00Z","cross_cats_sorted":["q-fin.ST"],"title_canon_sha256":"36bdcc3c508ed7e2c34cf5b5e116bd6642658070234ae95badf19ca94ecee80a","abstract_canon_sha256":"ddef2e0b29a63dde1f64a649373086fabf7636d3f7e96d5ea5ede81d0ce87266"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T01:14:38.303185Z","signature_b64":"aTYqrBqkoCoAKL8FzOFw22Dng6pXNjlMOQMJ5y2zF6j7ofcgeJxo7nXzHI3PYJsTrqAtWyFAQQy7nVso2rrKCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2dbe5eeda48201cd93f33d8a1cb3d7d26ffdea31c4c45b7cf8caa295cadd036b","last_reissued_at":"2026-06-24T01:14:38.302710Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T01:14:38.302710Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Empirical Confirmation of the Square-Root Law of Market Impact in a U.S. Large-Cap Equity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-fin.ST"],"primary_cat":"q-fin.TR","authors_text":"Aniket Vasaikar","submitted_at":"2026-06-22T23:52:00Z","abstract_excerpt":"We test the square-root law (SRL) of market impact on a single U.S. large-capitalisation equity, Apple Inc. 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