“Commodity investments stood at $376 billion as of Dec. 31, 2010, up from $270 billion the year before, helped by net inflows of $62 billion, the report said. While those net inflows were down from a record $72 billion the year before, institutional investors accounted for an ever-greater portion of the total as the year progressed — with a record $8 billion in December alone, according to the report. For the year, Barclays’ analysts estimated net institutional inflows of almost $46 billion, or almost three quarters of the total inflows.