"Delta-one" refers to products whose value moves in a one-for-one relationship with the underlying asset — a £1 rise in the underlying produces a £1 gain in the derivative. There is no optionality, no convexity. The delta-one desk sits within the equity division and runs a book of equity swaps, contracts for difference (CFDs), dividend swaps, index products, and ETF market making. Its primary purpose is to provide clients with cost-efficient synthetic access to equity exposure without the frictions of physical ownership.
Equity Swaps
An equity swap exchanges the total return on an equity asset (a stock, basket, or index) for a floating funding rate. The structure is identical to a total return swap on an equity underlier: the bank pays the client the dividends plus price appreciation on the reference equity and receives SOFR/SONIA plus a spread in return.
A typical use case: a UK pension fund wants exposure to the Nikkei 225 without the operational complexity of holding Japanese equities directly — custody, withholding tax, currency, and settlement all create headaches. The fund enters an equity swap with a bank: it pays the bank a floating rate (SONIA + 30bp) and receives the total return on the Nikkei 225 in sterling terms. The bank hedges by buying Nikkei futures or actual stocks. The pension fund gets clean, efficient exposure; the bank earns the spread.
What "Delta-One" Means in Practice
The term delta comes from options theory — delta measures how much an option's price moves for a unit move in the underlying. A delta of 1.0 (100%) means the derivative moves exactly with the underlying. Equity swaps, CFDs, futures, and ETFs all have delta of 1 by definition — they are pure directional exposure with no embedded optionality.
This matters operationally: the delta-one desk hedges its client positions using the most liquid and cost-efficient instruments available (futures, ETFs, or physical shares) and manages the residual risk from financing costs, dividends, and stock borrow. It does not manage options risk — that is the equity derivatives desk. The split between the two is sometimes blurry for structured products, but conceptually the distinction is between products with curvature (options) and products without (delta-one).
Index Swaps
Index swaps give clients exposure to equity indices — the S&P 500, FTSE 100, Eurostoxx 50, Nikkei 225 — synthetically. The bank hedges using index futures (which are very liquid and capital-efficient) or, for indices without liquid futures, by buying a basket of the underlying stocks. Index swaps are commonly used by large asset managers and sovereign wealth funds to implement tactical allocation shifts quickly, without the transaction costs and market impact of physically rebalancing large portfolios.
Dividend Swaps
A dividend swap allows investors to trade the dividends paid by an index or single stock separately from the price return. One party pays a fixed amount (the "implied dividend") and the other pays the actual dividends realised over the period.
Dividend swaps arose because options on equity indices embed a view on future dividends — when you buy a call on the Eurostoxx 50, you implicitly take a position on what dividends the index will pay over the option's life (dividends reduce the forward price and therefore the call's value). Sophisticated participants wanted to isolate and trade the dividend component separately. The Eurostoxx 50 dividend futures market (traded on Eurex) is the most liquid; implied dividends for the Eurostoxx 50 trade years and sometimes decades into the future.
Dividends are highly uncertain. During COVID-19 in 2020, European companies cut or cancelled dividends en masse, causing realised dividends to come in far below implied levels — a large loss for anyone who had bought the dividend swap (bet on high dividends) and a large gain for banks that had sold them.
Contracts for Difference (CFDs)
A contract for difference (CFD) is the retail and institutional version of a delta-one equity swap. It mirrors the economics of owning a share — the client profits or loses based on the price movement — without legal ownership. CFDs are traded on margin (typically 10–20% of notional for equities), giving leverage.
Institutionally, CFDs are used by hedge funds for efficient single-stock exposure, particularly when the cost of borrowing or buying the underlying is high. In the UK retail market, CFDs are regulated by the FCA and have strict leverage limits and negative balance protection requirements.
ETF Market Making
Exchange-traded funds (ETFs) track indices and trade like stocks on exchanges. Banks act as authorised participants (APs) and market makers in ETFs, creating and redeeming ETF shares to keep the ETF price in line with the underlying net asset value (NAV). When an ETF trades at a premium to NAV, an AP buys the underlying basket, delivers it to the ETF issuer, receives new ETF shares, and sells them — capturing the premium. The reverse occurs when the ETF trades at a discount.
The delta-one desk typically runs the ETF market-making book because the risk is pure directional equity exposure — the same risk it manages for equity swaps and CFDs. The profits come from the bid/offer spread and the arbitrage between the ETF and its underlying basket.
Post-Archegos Regulatory Treatment
Following the Archegos collapse in 2021, regulators and banks significantly tightened the margining and counterparty exposure management for equity swaps and TRS. Initial margin requirements were raised, and banks improved their cross-prime-broker exposure aggregation — attempting to see a client's total position across all counterparties rather than just their bilateral book. Disclosure requirements for significant economic interests held via derivatives (rather than physical shares) have also been tightened in multiple jurisdictions.