![Frankfurt, Germany - one of the countries to make MarkAxess's shortlist of possible locations](https://assets.fnlondon.com/2016/09/IMG012697_full4x3.jpg)
MarketAxess, which runs one of Europe's biggest electronic bond trading platforms, is planning to open a second office on the continent if the UK begins formal exit negotiations with the EU.
The Nasdaq-listed operator employs around 140 people at its London offices and has been growing fast in the region. It handled Eurobond trades worth $86.8 billion between January and August, a figure that is up 84% year-on-year.