ISHARES S&P/TSX GLOBAL GOLD INDEX

Ticker: IUTCF CUSIP: 46428M108 Class: ETF

TETRAD CORP's Holding History (CIK: 0000883597)

Note: Option positions (PUT/CALL) are excluded.

Q3 2012
Shares 22,400 Value ($000) $495 Avg Close — Range —
Q2 2012
Shares 22,400 Value ($000) $418 Avg Close — Range —
Q1 2012
Shares 22,400 Value ($000) $470 Avg Close — Range —
Q4 2011
Shares 21,000 Value ($000) $463 Avg Close — Range —