(Bloomberg) The inexplicable volatility that roiled the British pound last week came as no surprise to Bank of America Corp., which just days earlier warned that liquidity in the $5.1 trillion-per-day global currency market was far worse than anyone imagined.
Sterling sank 6.1 percent in a span of minutes in early Asian trading Oct. 7, following at least three other bouts of puzzling foreign-exchange turbulence in the past two years. The latest episode involved the fourth-most-traded currency, serving up a stark reminder of the pitfalls that investors face in the world’s biggest financial market as banks — the traditional middlemen — step back amid post-crisis regulations.