Contract Interest is calculated daily on all open CFD positions held at the close of the trading session, and is applied as a blended rate based on notional balances as shown below.

NOTE: Starting August 1, 2018 an additional spread of 1% will be added to the rates below for clients classified as retail clients under MIFID.

Contract Interest is calculated daily on all open CFD positions held at the close of the trading session.

NOTE: Starting August 1, 2018 an additional spread of 1% will be added to the rates below for clients classified as retail clients under MIFID.

Note: *Index CFD interest is charged at a uniform rate of BM +/- 1.5% regardless of balance. Index CFD balances are not included in the determination of the applicable rate for Share CFDs.

Contract interest rates are determined by IBKR and may be adjusted from time to time at IBKR’s discretion.

Contract interest is always applied in the contract currency of the CFD, and is calculated using the formula:

Contract Interest = I xUPV x N/360 (365 for GBP)

Carry interest is calculated daily on all open CFD positions held at the close of the trading session, and is applied as a blended rate based on notional balances as shown below.

The carry interest for IBKR Forex CFDs is based on a currency-pair specific benchmark and a spread. The benchmark is the difference between the IBKR benchmark rates for the two currencies. It is calculated as + BM Base currency – BM Quote currency.

The applicable customer rate is Pair BM – IBKR spread for long positions, Pair BM + spread for short positions. It is important to note that the long rate is applied as a credit, the short rate as a debit. Consequently for a long position a positive rate means a credit, a negative rate a charge. However for short positions a positive rate means a charge, a negative rate a credit.

Interest is calculated on the contract value expressed in the quote currency, and credited or debited in that currency.

IBKR Forex CFDs*

NOTE: Starting August 1, 2018 an additional spread of 1% will be added to the rates below for clients classified as retail clients under MIFID.

Note: * Interest on Forex CFD balances is calculated on a stand-alone contract basis, and not combined or netted with other currency exposures, including Spot FX. Although IBKR does not directly reference swap rates, IBKR reserves the right to apply higher spreads in exceptional market conditions, such as during spikes in swap rates that can occur around fiscal year-ends.

1. For Forex CFDs a positive rate will be paid to your account if your position is long, and charged to your account if your position is short. The reverse applies to negative Forex CFD rates.

IBKR’s benchmark for each currency is the reference rate around which our credit, debit, stock loan and other interest rate linked calculations are determined. IBKR uses a combination of internationally recognized reference rates (such Fed Funds), bank deposit rates, and dynamic interbank rates determined from foreign exchange and money markets to calculate an IBKR Reference Benchmark rate.

BACKGROUND

In determining the interest that account holders are paid on cash credit balances and charged on debit balances, each currency is assigned an IBKR Reference Benchmark rate. The IBKR Reference Benchmark rate is determined from short-term market rates but capped above/below widely used external reference rates or, where appropriate, bank deposit rates. This page explains how IBKR Reference Benchmark rates are determined.

Reference Rates

Reference rates are determined using a three-step process. The rates are capped above/below traditional external reference rates. For currencies and IBKR affiliates where Forex swap market pricing does not affect the rates we pay and charge our customers, Step 1 is omitted from the final rate determination.

1. Market implied rates

For market pricing, we utilize short-term Forex swap markets. Since most of the transactions involve the US dollar, Forex swap prices of currencies vs. the US dollar are sampled over a pre-determined time period referred to as the “Fixing Time Window” that is intended to be representative of liquid trading hours and primary turnover. The specific swap tenor and fixing windows used depend on the currency. We use the best bid and ask from a group of up to 12 of the largest Forex dealing banks to calculate the implied non-USD short-term rates – generally Overnight (T/T+1), Tom Next (T+1/T+2) or Spot Next (T+2/T+3). At the Fixing Time Window close, these calculations are sorted with the lowest and highest rates disregarded and the remainder averaged to determine the market implied reference rate.

2. Traditional external benchmark reference rates

For traditional benchmarks, we utilize published reference rates and, where appropriate, bank deposit rates. These rates generally are determined by either bank survey or actual transactions. The Hong Kong Inter-Bank Offered Rate (HIBOR), for example, is determined by surveying a panel of banks for the rate at which they could borrow funds from other banks at a specific time each day. In contrast, the US dollar Fed Funds effective rate is calculated as the weighted average of interbank lending rates transacted in the Fed Funds market.

The reform on interest rate benchmarks (IBOR reform), launched in 2013 by the G20 nations and conducted by regulatory authorities and public and private sector working groups, is gradually replacing bank survey based rates with new transaction driven reference rates.

3. IBKR Reference Benchmark Rates

The final IBKR Reference Benchmark rates are then determined by using the market implied reference rate, as described in 1. above, but capped by a certain amount above/below the traditional external benchmark reference rate as described in 2. above. For currencies and IBKR affiliates where Forex swap market pricing is not relevant, the final IBKR Reference Benchmark rates are determined by using traditional benchmarks or bank deposit rates, capped as above. The caps can change at any time without explicit prior notice and are listed in the table below, along with relevant currency and benchmark reference rates.

Examples

a. Assume the market implied overnight rate for GBP is 0.55%. The Sterling Overnight Index Average (SONIA) reference rate is 0.65%. The effective rate is then equal to the market implied rate of 0.55%, as it is still within the 1.00% cap around the SONIA reference rate at 0.65%.

b. If, for example, the market implied rate for CNH was 4.5% but the overnight CNH reference rate for the same period was 1.0%, the effective rate would be capped at 2.0% above the CNH reference rate, or 3.0% (1.0% reference rate + 2.0% cap).

¹ Caps or the deviation for the effective rate allowed above or below the benchmark fixing can change at any time without explicit prior notice.