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CUSIP: 629491101 Class: COM

Rafferty Asset Management, LLC's Holding History (CIK: 0001389426)

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

Q3 2013
Shares 6,822 Value ($000) $286 Avg Close — Range —
Q2 2013
Shares 10,490 Value ($000) $434 Avg Close — Range —