Alameda County Treasury Pool — Total-Return engine demonstration data set (RFP 902732)
House Strategies Group

Five production-format series, 2020-01 to 2026-03 (the formats a fully dollar-tied recast needs):
  A_holdings.csv     Period-end positions per CUSIP, monthly: par, book, MONTH-END MARKET VALUE, accrued, coupon, maturity, rating, pricing source.  [SymPro Investment Portfolio/Status]
  B_transactions.csv Buys/sells/calls/maturities/coupons with dates, price, principal, realized G/L (~2,795 rows).                                   [SymPro Activity]
  C_cashflows.csv    External contributions/withdrawals (apportionment IN / disbursements OUT), dated — stripped from performance.                   [GL / Auditor-Controller]
  D_income.csv       Interest received, accrued change, amortization/accretion, total income (monthly).                                              [SymPro Earnings]
  E_custodial.csv    Independent custodial month-end market values + reconciliation to holdings (within 0.03%).                                       [Custody bank feed]

NOTE: A (holdings) is the County's REAL 31,129-row historical book; B/C/D/E are modeled for the demonstration.
Month-to-month PRICE change is taken from A's month-end market value and reconciled to E (custodial).
Run these through the engine (or the live page) to reproduce the six-year time-weighted total return: +17.23% / growth of $100 to $117.23.
