Securities and Exchange Commission’s probe into the $3.6 billion (2.19 billion pounds) Pimco Total Return Exchange-Traded Fund (BOND.P) has been going on for at least a year, but has picked up pace in recent weeks, the Wall Street Journal reported on Tuesday, citing unnamed sources. The SEC’s probe is looking into how the ETF bought and then valued its investments in bonds and whether that led to inaccurate information about the fund’s actual performance being given to investors, the Journal reported.