24 Aug 2021 3 min read

To repo better, you gotta be clever how you sow…

By Wilson Poon , Ivy Zhang

What is nettable repo, and why should the LDI community care?



So far in 2021, the UK’s liability-driven investment (LDI) community has experienced a very attractive repo funding market, in which cash is lent in exchange for collateral.

As observers of this market will probably already be aware, the sub-12-month gilt repo funding spread over the equivalent SONIA swap rate has come down significantly to levels below 10 basis points, a multi-year low. Our colleague Nelly Terekhova elaborated on this movement recently.

However, it may be less commonly known that the Z-spread (i.e. the spread between the gilt yield and swap rate of an equivalent SONIA swap) of very short-dated conventional gilts has also reached a multi-year low over the same period. While such bonds are less commonly used as hedging instruments in an LDI strategy due to their relative richness compared with alternatives – such as swaps, credit investments, or interest-rate exposure from index-linked gilts in the same sector – we believe they can offer a lot of value from a different perspective, namely ‘nettable’ repo.

In the chart below, the blue band is the indicative year-to-date range of tradable levels of a two-year nettable repo, compared with that of a 12-month normal/traditional repo (the dark blue dots).

The level hovered about the breakeven point, where it was marginally advantageous to use nettable repos in the first half of the year, and has come inside significantly since July. This allowed us to transact and lock in two- to three-year term repo funding at a level around two basis points above the equivalent SONIA swap rate, which is a level last seen in 2017.

What is nettable repo?

Normal or traditional repo is a repurchase agreement whereby investors sell a security (most commonly a highly rated government  bond) to a counterparty and agree to buy it back on a future date at an agreed price. This allows investors to release the capital locked in holding the security and raise cash, by paying a funding cost, i.e. repo interest. A reverse repo is the opposite: investors deposit money in exchange for a bond with an agreed future sell-back price.

Nettable repo is a package of repo transactions that involves simultaneously trading a normal or traditional repo on the gilt you want to hold in the portfolio (e.g. a long-dated index-linked gilt) as well as a reverse repo on a short-maturity gilt.

From a counterparty perspective, the funding position will net down to close to zero (hence the term nettable repo), so there is very little net loan or deposit between the two parties. Economically, the effective funding cost the investors will pay becomes the yield of the short bond plus a spread the counterparty charges to facilitate the trade.

Therefore, as short-dated conventional gilts become richer – i.e. have a lower Z-spread – the effective funding cost of a nettable repo will also come down.

What it takes to be clever…

While nettable repo is part of a standard toolkit for our LDI portfolio management, as an instrument itself it is not without challenges. Compared with normal or traditional repo, it is longer dated, more complex to transact and to process operationally, and very dependent on counterparty axes.

In order to manage these additional nuances, we have worked with counterparties to build a standardised approach, as well as developed a robust management framework that we believe allows portfolio managers to assess values holistically on an ongoing basis and manage client positions accordingly.

We continue to monitor this part of the market and focus our efforts on the most efficient strategies as and when they become available.

Wilson Poon

Senior Portfolio Manager

Wilson is responsible for structuring liability-driven investment strategies for both pension schemes and insurance clients. Wilson joined LGIM in 2009, starting in the index fund team and later became an index fund manager before moving to the LDI team in 2013. Prior to this, Wilson started his career as a performance analyst in State Street Bank and Trust Company (Hong Kong) in 2005. Wilson is a CFA charterholder, holds a bachelor's degree in professional accountancy from the Chinese University of Hong Kong, and is a certified Financial Risk Manager (FRM).

Wilson Poon

Ivy Zhang

Solutions Strategist Associate

Ivy is a member of the Solutions Group at LGIM. Ivy joined LGIM in 2020 from PwC, where she was an associate within the Investment Consulting team and advised a range of defined-benefit pension funds on their investment strategies. Ivy graduated from Warwick University and holds a BSc(Hons) in Mathematics and Business Studies. She has passed all three levels of the CFA programme, and may be awarded the charter upon completion of the required work experience.

Ivy Zhang