MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

Texas Yale Capital Corp.'s Holding History (CIK: 0001332342)

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

Q3 2015
Shares 151,296 Value ($000) $6,492 Avg Close — Range —
Q2 2015
Shares 167,000 Value ($000) $9,415 Avg Close — Range —
Q1 2015
Shares 163,245 Value ($000) $10,790 Avg Close — Range —
Q4 2014
Shares 163,061 Value ($000) $10,956 Avg Close — Range —
Q3 2014
Shares 142,539 Value ($000) $10,950 Avg Close — Range —
Q2 2014
Shares 120,540 Value ($000) $8,628 Avg Close — Range —
Q1 2014
Shares 128,530 Value ($000) $8,396 Avg Close — Range —
Q4 2013
Shares 84,395 Value ($000) $5,581 Avg Close — Range —
Q3 2013
Shares 90,395 Value ($000) $6,529 Avg Close — Range —
Q2 2013
Shares 86,795 Value ($000) $5,802 Avg Close — Range —