MERCK & CO INC

CUSIP: 589331107 Class: COM

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

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

Q3 2009
Shares 75,500 Value ($000) $2,388 Avg Close — Range —
Q2 2009
Shares 75,500 Value ($000) $2,111 Avg Close — Range —
Q1 2009
Shares 74,800 Value ($000) $2,001 Avg Close — Range —