China slightly increased its US Treasury holdings in August and September – though the uptick did little to offset an overall downward trend – as persistent worries over US debt sustainability and the Federal Reserve’s independence deepened doubts about the safety of assets backed by the US dollar.The country’s stockpile rose to US$701 billion in August, up from July’s multi-year low of US$696.9 billion, but it again trimmed the total to US$700.5 billion in September, according to data from the...