I dont know the details either, I can only go by what the government reports:
"
Heritage Fund 2nd Quarter Update
November 15, 2006
At September 30, 2006, the fair value of the Heritage Fund stood at $15.4 billion. The net assets of the Fund increased by $995 million in the second quarter of 2006-07.
Contributions, inflation-proofing and unrealized capital gains accounted for the increase during the quarter.
"
http://www.finance.gov.ab.ca/business/ahstf/index.html
MYK