403-            quarterly_income = []
404-        if quarterly_income:
405-            income_periods = list(income_periods) + list(quarterly_income)
406-    if not income_periods:
407-        raise RuntimeError(
408:            f"Provider returned no financial periods for {ticker}; "
409-            "refusing to commit stale data or trigger recompute."
410-        )
411-
412-            balance_by_period.update(_fetch_statements_by_period(
413-                adapter, lambda t: adapter.get_balance_sheets(t, period="quarter"), ticker,
414-                "balance_sheets_quarterly"))
415-            cash_by_period.update(_fetch_statements_by_period(
416-                adapter, lambda t: adapter.get_cash_flows(t, period="quarter"), ticker,
417-                "cash_flows_quarterly"))
418-