OIL SERVICE HOLDERS TRUST

CUSIP: 678002106 Class: COM

RATIONAL ADVISORS LLC's Holding History (CIK: 0001143565)

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

Q3 2011
Shares 12,500 Value ($000) $1,289 Avg Close — Range —
Q2 2011
Shares 12,600 Value ($000) $1,915 Avg Close — Range —
Q1 2011
Shares 12,300 Value ($000) $2,022 Avg Close — Range —
Q4 2010
Shares 12,300 Value ($000) $1,729 Avg Close — Range —
Q1 2010
Shares 12,200 Value ($000) $1,496 Avg Close — Range —
Q4 2009
Shares 15,100 Value ($000) $1,795 Avg Close — Range —
Q3 2009
Shares 15,100 Value ($000) $1,773 Avg Close — Range —
Q2 2009
Shares 15,100 Value ($000) $1,475 Avg Close — Range —
Q1 2009
Shares 12,100 Value ($000) $898 Avg Close — Range —