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31 Jul 2015

Bank of England issues consultation on a new sterling money market data collection and SONIA's reforms


The Bank of England has today published a consultation document setting out in detail plans for a new sterling money market data collection.  The consultation describes how the Bank plans to use these data to reform the Sterling Overnight Index Average (SONIA) benchmark interest rate. SONIA is a basis for British interest rate futures, which investors use as a guide to future moves in interest rates. 

The aim is to secure and improve the information available to the Bank on conditions in sterling money markets. ‘The Bank intends to collect transaction-level data from banks, building societies and major investment firms on their secured and unsecured sterling money market borrowing activity.  This will provide the Bank with a better understanding of developments in short-term interest rates, benefiting the Bank’s analysis of both monetary and financial conditions.  It will also provide a richer picture of activity in the sterling money market, enabling the Bank to better assess overall market effectiveness’. 

As announced by the Bank, 'the consultation sets out, at a high level, the Bank’s plans to reform SONIA, a key overnight unsecured interest rate benchmark.  These plans are likely to be of interest to users of SONIA, including participants in the sterling Overnight Indexed Swap (OIS) market'. 

The Bank and the Wholesale Market Brokers’ Association (WMBA) – which currently administers SONIA – are working towards the Bank taking over as administrator of SONIA in early 2016 so that, in due course, SONIA can be transitioned to a new broader basis. 


The BoE will consult on the planned changes until October 1st. It intends to implement changes following a second round of consultation. The Bank anticipates that it will be in a position to consult on detailed plans for the reform of SONIA in the second quarter of 2016. 

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