About WMBA
WMBA currently collates, administers and publishes the Repurchase Overnight Index Average (‘RONIA’) and Euro Overnight Index Average (‘EURONIA’) which were introduced in January 2011 and January 1999 respectively.

RONIA – Repurchase Overnight Index Average
Introduced in 2011, RONIA is the Repurchase Overnight Index Average (RONIA), a UK money market index that tracks actual market overnight funding rates. On 1st April 2015, RONIA became a regulated benchmark as governed by the Financial Conduct Authority (FCA). RONIA is a measure of the rate at which interest is paid on secured sterling overnight wholesale funds in circumstances where the collateral is not subject to any exceptional, special, nor specific demand in the cash market.
Data contributed by BGC Group, BrokerTec (part of the CME Group) and Tullett Prebon (part of the TP ICAP Group).
Key Characteristics
- Low-cost daily reference pricing source
- Interesting to international and local, regional market participants
- Data sourced from highly liquid market participants
- Regulator approved, independent data
- Suitable for both pre- and post-trade analytics
- Based on the highest market share and underlying liquidity
Subscription
WMBA end user pricing
$55

EURONIA – Euro Overnight Index Average
Introduced in January 1999, EURONIA is the Euro Overnight Index Average (EURONIA). This index tracks actual market overnight funding rates. EURONIA is a measure of the rate at which interest is paid on Euro denominated short-term wholesale funds in circumstances where credit, liquidity and other risks are minimal.
Data contributed by BGC Group, Tullett Prebon and ICAP (both part of the TP ICAP Group) and Tradition (UK) Ltd.
On each publication day RONIA and EURONIA are measured as the volume weighted average price (VWAP) of interest rates paid on eligible transactions.
Key Characteristics
- Low-cost daily reference pricing source
- Interesting to international and local, regional market participants
- Data sourced from highly liquid market participants
- Regulator approved, independent data
- Suitable for both pre- and post-trade analytics
- Based on the highest market share and underlying liquidity
Subscription
WMBA end user pricing
$55