Treasury Accounting and Profitability Measurement: P&L and Revaluation (IIBF Treasury Management)

Treasury accounting and profitability measurement decides how a bank prices, values, and scores every trade its dealing room executes. Get the trading book vs banking book split wrong, or mix up accrual and mark-to-market rules, and reported profit stops reflecting real economic performance. For CAIIB Treasury Management candidates, this is one of the most numerically testable areas in the paper — expect questions on P&L recognition, revaluation entries, the transfer-price interface, and how banks judge whether a dealer actually added value.

📊 Trading Book vs Banking Book: Two Different P&L Worlds

Every position a bank carries falls into one of two accounting worlds. The trading book holds positions taken with the intent of profiting from short-term price movements — government securities under FVTPL (fair value through profit and loss, the category that replaced the old HFT bucket), forex positions, and derivative trading books. The banking book holds assets meant to be carried to maturity or as part of core banking business — loans, advances, and HTM (held-to-maturity) investments.

This classification is not cosmetic. It decides how profit is recognised. Trading book positions are revalued to current market price at each reporting date, and the change flows straight into the P&L account, whether the position has actually been sold or not. Banking book assets, by contrast, sit on the books at amortised cost, with interest accrued over time and no revaluation gain or loss unless the asset is impaired or actually sold.

A treasury desk dealing in the treasury function therefore needs separate P&L logic for each book. Mixing the two — say, treating an AFS security's unrealised appreciation as distributable trading profit — is a textbook error and a favourite trap in CAIIB numericals.

📈 Accrual Accounting vs Mark-to-Market Valuation

Accrual accounting recognises interest income or expense evenly over the life of an instrument, regardless of what the market price is doing on any given day. It is the natural fit for the banking book — a loan or an HTM investment held to maturity earns its coupon or interest rate step by step, and short-term price noise is irrelevant because the bank never intends to sell before maturity.

Mark-to-market (MTM) valuation does the opposite: it re-prices the position to the current market rate at every valuation date and books the difference as a gain or loss immediately. This is essential for the trading book, because a dealer's economic exposure changes the moment the yield curve moves, even before any security is sold. Ignoring that would let a trading book carry hidden losses indefinitely.

RBI's revised investment classification framework for commercial banks — effective from April 1, 2024 — organises the entire investment portfolio into three buckets: HTM (amortised cost, no MTM), AFS (fair value changes routed through an AFS reserve within equity, recycled to P&L only on sale), and FVTPL (fair value changes booked straight to P&L). Understanding which bucket a security sits in is the single fastest way to answer an accounting-treatment MCQ correctly. The fixed income securities, duration and convexity chapter builds the valuation mechanics this framework depends on, and pairs well with a deeper look at bond convexity in treasury portfolios for the price-sensitivity side of the same securities.

💡 Exam Tip: If a question asks where an unrealised gain on an AFS security is booked, the answer is the AFS reserve — not straight to P&L. Only FVTPL and realised AFS gains hit the P&L account directly.

🔄 Revaluation Entries: How Treasury Books the Mark

A revaluation entry is the accounting step that converts a market price move into a recorded number. For an FVTPL security, the dealing desk or back office picks up the closing market price (or a model price for illiquid instruments), compares it against the carrying value, and passes an entry debiting or crediting a revaluation account against the P&L. For forex positions, the same logic applies at the day's closing exchange rate, with unrealised translation gains and losses flowing through the profit and loss account as per extant accounting norms.

Because these entries directly move reported profit, banks build strict controls around them — independent price verification, a middle office that checks the rates dealers use, and reconciliation against exchange or market data feeds before the entry is passed. A dealer marking their own book at a favourable price, without independent verification, is exactly the control gap that revaluation checks exist to close.

AFS securities follow a gentler path: unrealised gains and losses move into the AFS reserve, not P&L, until the security is actually sold, at which point the cumulative gain or loss is recycled into the P&L account as a realised item. HTM securities generally skip revaluation altogether unless there is a diminution that is other than temporary, in which case a provision is required.

⚠️ Common Mistake: Candidates often assume "marked to market" means the same treatment everywhere. It doesn't — HTM stays at cost, AFS moves through reserves, and only FVTPL flows straight to P&L. Know the bucket before you answer.

💰 The Funds Transfer Pricing Interface

Treasury rarely deals only for its own book. It also acts as the internal bank for every business unit — funding the branches that lend money and absorbing the deposits branches raise. Funds Transfer Pricing (FTP) is the mechanism that prices this internal exchange: treasury "buys" deposits from the liability-raising units at a transfer rate and "sells" funds to the asset-creating units at a (usually higher, maturity-matched) transfer rate.

This interface is central to treasury accounting and profitability measurement because it splits a bank's total net interest income into three clean pieces: the spread the deposit-raising unit earns versus the transfer price, the spread the lending unit earns versus the transfer price, and the residual treasury earns from managing the gap between transfer-priced inflows and outflows plus its own trading gains. Without FTP, a bank cannot honestly say whether its profit came from good lending, cheap deposits, or treasury's own market calls.

The integrated treasury chapter covers how this interface links treasury to ALM and business-unit accounting, and it is worth reading alongside treasury back office operations, since the back office is where FTP entries and revaluation postings get independently verified before they reach the general ledger.

🎯 Measuring Dealer and Desk Performance

Raw trading profit is a poor scorecard on its own — a large profit earned by taking outsized, unauthorised risk is not good performance, it is a control failure waiting to surface. Banks instead measure desk performance on a risk-adjusted basis: P&L relative to the VaR (Value at Risk) or position limits sanctioned for that desk, consistency of returns across the trading period, and adherence to stop-loss and exposure limits rather than one lucky quarter.

Attribution matters too. A desk's P&L is typically split between spread income (bid-offer capture on client-driven flow), positioning gains (directional bets on rates or currency movement), and carry (the accrual difference between funding cost and asset yield). A dealer who consistently earns spread income within limits is a very different risk profile from one whose P&L depends on a single large directional call, even if the second dealer's number looks bigger this month.

This is also where bond portfolio management discipline and treasury's own middle office limits intersect with accounting: the P&L a desk reports must be reconciled against the risk it actually took, and every large revaluation swing should map back to a position that was within sanctioned limits when it was taken. For how deals reach the desk in the first place, see treasury front office operations, and for how corporate-facing desks build profitable flow, see treasury products for corporate customers.

📌 Remember: A dealer's true performance is P&L per unit of risk taken, not P&L alone. Two desks with identical profit can have very different risk quality.

For the full architecture connecting these desks to the wider market, revisit the financial market chapter, and browse more posts on the treasury management tag hub for related exam-focused reading.

🧠 Practice MCQs: Treasury Accounting and Profitability Measurement

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✅ Build This Into Your CAIIB Prep

Treasury accounting and profitability measurement ties together everything else in the Treasury Management paper — valuation, risk limits, and the FTP interface all converge on how P&L finally gets reported. Revisit the underlying scope and function of treasury management chapter to anchor these accounting rules in the desk structure they apply to, then test yourself against exam-pattern questions on the CAIIB course page to lock in the accrual-versus-MTM distinctions before exam day.

The valuation and classification rules behind these entries are laid down in RBI’s master directions on investments, published on the Reserve Bank of India website.