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CUSIP: 629491101 Class: COM

NISA INVESTMENT ADVISORS, LLC's Holding History (CIK: 0000937615)

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

Q3 2013
Shares 14,500 Value ($000) $609 Avg Close — Range —
Q2 2013
Shares 14,500 Value ($000) $600 Avg Close — Range —