FTSE Mondo Visione Exchanges Index Down 2.7 % In March, London Stock Exchange Group Down By 28.8% On Refinitiv Integration Fears, Index Down 0.5 % In Q1 2021, Up 35.3% Over 12 Months Date 12/04/2021 The implosion of Archegos caused wide-spread chaos on markets amidst concerns on the potential contagion effect that the sell-off could have on global equity markets where sentiments have recently been dampened by surging bond yields. Despite returning a solid set of figures for full-year 2020, London Stock Exchange Group's (LSEG's) updated guidance for operating costs and capital expenditure for 2021 provided a strong indication of the challenges that are still to come with integrating Refinitiv, and this had a negative impact on the LSEG share price and performance in March.