Conglomerate has quietly amassed a $6.7bn stake in New York-listed insurance group
SFO to re-examine cases including former UBS and Citigroup trader Tom Hayes
Bank ditched asset-swap plan connected to oligarch Oleg Deripaska after letter warning of potential secondary sanctions
Comments come after watchdog said he supported new rules that could increase capital requirements
We want to put money into the stock market but are worried about the risks