Duke Energy Corp

CUSIP: 26441C105 Class: COM

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

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

Q2 2012
Shares 57,750 Value ($000) $1,332 Avg Close — Range —
Q1 2012
Shares 68,000 Value ($000) $1,429 Avg Close — Range —
Q4 2011
Shares 154,600 Value ($000) $3,401 Avg Close — Range —
Q3 2011
Shares 96,900 Value ($000) $1,937 Avg Close — Range —
Q4 2010
Shares 81,900 Value ($000) $1,459 Avg Close — Range —
Q1 2010
Shares 132,500 Value ($000) $2,162 Avg Close — Range —
Q4 2009
Shares 132,500 Value ($000) $2,280 Avg Close — Range —
Q3 2009
Shares 166,900 Value ($000) $2,627 Avg Close — Range —
Q2 2009
Shares 166,900 Value ($000) $2,435 Avg Close — Range —
Q1 2009
Shares 147,500 Value ($000) $2,112 Avg Close — Range —