Which Financial Index tracks the Thrift Savings Plan S Fund?

Question

The TSP's summary sheet for the S Fund indicates that it tracks the Dow Jones Wilshire 4500 Completion Index. However, there seems to be several Dow Jones Wilshire 4500 indices (e.g. ^DWCPT, ^DWCPFT, ^ DWCPF, & ^DWCP). See http://finance.yahoo.com/lookup?s=wilshire

Which one actually tracks the S Fund?

Answer 1

http://www.wilshire.com/Indexes/Broad/Wi...

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