The Ada County treasurer on Oct. 7 presented the month‑end investment report for September, closing fiscal year 2025. The office reported total interest received for the fiscal year of approximately $12.316 million, slightly above the forecast range of $11.6 million to $12.6 million.

Treasury staff said they moved $5 million out of a Vanguard money‑market account into longer-term investments in September to lock in yields before expected Federal Reserve rate cuts. Purchases included a mortgage‑backed security and a municipal bond issued by the Idaho Housing and Finance Association; the IHFA purchase had a reported yield-to-maturity of about 5.914% and was identified as a taxable tranche in discussion.

Treasury staff described expectations for FY2026 interest receipts of roughly $9.3–9.4 million based on macroeconomic forecasts and a possible reduction in short‑term rates. The report also noted the county’s approach to balance liquidity and yield, and that purchases underwent review with the county’s investment advisor.

Commissioners asked clarifying questions about specific purchases and auctioned property status; staff said an auction sale had a single bidder and the successful bidder has until December to fund the purchase and finalize ground-lease negotiations with the City of Boise.