Chinese regulators have advised financial institutions to rein in their holdings of US Treasuries, citing concerns over concentration risks and market volatility, according to people familiar with the matter. Bloomberg's Ven Ram reports. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.com for business news & analysis, up-to-