Methodology

The official rate

We read the Bank of Ghana's published daily interbank table and record its buy and sell figures for the dollar, euro and pound. The table is checked every hour; a new entry is written only when a number actually moves, so the change log stays meaningful. If the official table is unavailable, we temporarily fall back to live market rates and label the entry accordingly.

The black market rate

Parallel-market figures come from our trusted dealer network — collected daily and, when needed, entered by Cedi Times staff. Nobody can post a rate publicly. Every manual entry names the staff member who recorded it and appears in the public change log immediately.

For the period before our daily collection began, black market figures shown in the history are estimates: each day's official rate adjusted by the market gap we observe today. They are marked “Estimated” in the change log and are indicative only.

The audit trail

Rate history is append-only — entries are never edited or deleted. Each row keeps the previous value, the new value, the origin (automatic feed or manual) and the exact timestamp.