A good exchange statement answers three questions: what moved, when it moved, and what was charged for moving it. It does not answer whether you made money, because it does not know your cost basis on assets you transferred in, and it does not know what you did elsewhere. Read it as a record of events, and it becomes useful.

• Statements describe flows, not performance. Deposits, withdrawals, trades and fees are events. Profit and loss is a derived figure that depends on assumptions the statement does not contain.
• Timestamps are usually in one timezone. Most venues record in UTC. A trade at 23:40 UTC lands on a different calendar day in many local timezones, which matters at period boundaries.
• Fees appear in two currencies. Some are charged in the asset bought, some in the quote currency. Summing a column without checking the unit produces nonsense.
• Reconciliation is the test. Opening balance plus inflows minus outflows should equal closing balance. If it does not, something in the statement is missing or misread.

What an exchange statement is built from

A statement is a rendering of the venue’s internal records over a period. Each line corresponds to a booked event, and the same event can appear more than once in different sections — once as a trade, once as a fee, once as a balance change.

Double counting is therefore easy. Knowing which section is authoritative for which question is most of the skill.

The four sections you will find

Most exports contain a transaction history, a fee summary, a deposit and withdrawal log, and an opening and closing balance. The first is the detail, the second is a subtotal of the first, and the third records movements that never touched the order book.

For activity, use the transaction history. For charges, check the fee summary against the detail. For anything leaving without your knowledge, use the withdrawal log — the shortest and most important section.

Why the statement will not match your screen

Your portfolio view marks holdings to current prices. The statement records historical events at their historical prices. Between the two sits every price change since the event, which the statement has no reason to know about.

Recent activity commonly lags by a day or more, and pending withdrawals can appear in one section before another. Neither is an error; both make same-day comparison misleading.

The numbers people misread on an exchange statement

Three line items cause most of the arguments, and each has a specific reading error behind it.

Realised versus unrealised

Realised amounts come from closed positions and are fixed at the moment of the closing trade. Unrealised amounts move with price and are an estimate at the timestamp on the report. A statement that shows a large unrealised figure is describing a moment, not a result.

A statement run at a different hour of the same day can show a materially different total with no trade in between. Note the generation time when comparing periods.

Fees quoted in the asset, not the currency

Many venues charge a fee in the asset you receive. Buy a small amount of a token and the fee arrives as a slightly smaller amount of that token, not as a separate currency charge. On the statement it may appear as a reduced quantity rather than an explicit cost.

This is the most common source of “where did my fee go” questions. The cost is real, just denominated in what you bought; its currency value at the time of the trade is the figure you need.

Transfers in versus trades

An asset arriving from an external wallet is not a purchase. It has no price on the statement, because the venue never saw the price you paid. Treating an inbound transfer as a buy at the day’s market price will overstate or understate your position by however far your original entry price sits from today.

Reconciling an exchange statement

Reconciliation means proving the closing balance from the opening balance and the events in between. Worked through on a small illustrative account, the method is straightforward.

Start with 10,000 USDC and no other holdings. During the period you buy 2 units at 2,500 each with a 5 USDC fee, sell 1 unit at 3,000 with a 3 USDC fee, and withdraw 500 USDC. Every figure is illustrative.

1. Opening balance: 10,000.00 USDC, 0 units.
2. Buy: −5,000.00 for the two units, −5.00 fee. Cash is now 4,995.00, holdings are 2 units.
3. Sell: +3,000.00 for one unit, −3.00 fee. Cash is now 7,992.00, holdings are 1 unit.
4. Withdraw: −500.00. Cash closes at 7,492.00.
5. Closing balance should be 1 unit and 7,492.00 USDC. If the statement says otherwise, find the discrepancy before drawing any conclusion from the period.
6. Total fees for the period are 5.00 + 3.00 = 8.00, or about 16 basis points on the 5,000.00 of buying and 3,000.00 of selling combined.
7. Repeat the check against the venue’s own closing balance field; a mismatch there usually means a pending item or a timezone boundary, not a missing trade.

A statement you cannot reconcile is not evidence of a problem, but it is a reason to stop reading the summary and start reading the detail.

Using an exchange statement beyond bookkeeping

The statement is also the input to any tax or audit process, and that is where its limits bite hardest. Cost basis methods differ — some jurisdictions use first-in-first-out, others allow average cost, and the treatment of transfers between your own accounts varies.

A venue only sees its own side, so one statement cannot describe assets held elsewhere. Consolidating across accounts is your job, and it is easier monthly than annually.

What to keep and for how long

Keep the full transaction-level export, not the PDF summary. Summaries drop the identifiers you need to match trades across accounts, and retention periods differ by jurisdiction. Check local rules for how long records must be kept; the safe habit is to keep everything and archive it offline.

Name exports with their generation date and keep a copy that does not depend on continued access to the venue. If an account is closed or restricted, the export is all you will have.

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