1[2 {"id": "C1", "text": "The input file covers 2010-01-04 to 2019-12-31 and contains zero rows with post_cut = 1.", "results_keys": ["sample_start", "sample_end", "n_treated", "n_input_rows"], "status": "supported", "caveat": "Coverage limit stems from the query end_date documented in data/README.md."},3 {"id": "C2", "text": "The effect of the 2020-03-04 cut on the mean one-day 5-year yield change cannot be estimated from the provided data; the estimand keys are null and the conclusion is premise_invalid.", "results_keys": ["effect_estimate", "effect_ci_low", "effect_ci_high", "model_metric", "n_analysed", "conclusion", "feasibility", "feasibility_reason"], "status": "supported", "caveat": "Not evidence for or against any effect; it is a data-coverage failure."},4 {"id": "C3", "text": "The descriptive baseline mean one-day change over the whole file is about -0.043 bp per day (sd about 4.24 bp).", "results_keys": ["baseline_metric", "baseline_change_sd_bp", "n_changes"], "status": "supported", "caveat": "Pre-event period only; not a counterfactual for March 2020."}5]6