About: http://webisa.webdatacommons.org/398434514

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	So if one group is notably worse at investing than others at a given time(and there are certainly times when they are), then by definition another group of investors will collectively beat the index - especially over the long term.
http://www.w3.org/ns/prov#wasQuotedFrom	economist.com