WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

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

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

Q4 2009

Shares 40,700 Value ($000) $1,015 Avg Close — Range —

Q3 2009

Shares 40,700 Value ($000) $1,046 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2009	40,700	$1,015	—	—
Q3 2009	40,700	$1,046	—	—