fwiw...

Source: http://infoventure.tsx.com/TSXVenture/TSXVentureHttpController?GetPage=ShortSummary&SECURITY_ID=204184&MARKET_ID=CDNX&SEC_SYM_SID=1&HC_FLAG1=Y&HC_FLAG1=Y

Short Summary

Matamec Explorations Inc. ( MAT )

As of Short Volume Change In Volume
15/Jan/2013 91,852 66,352  +
31/Dec/2012 25,500 8,000  +
15/Dec/2012 17,500 0  .
30/Nov/2012 17,500 -29,500  -
15/Nov/2012 47,000 46,625  +
31/Oct/2012 375 -235,881  -
15/Oct/2012 236,256 234,400  +
30/Sep/2012 1,856 1,525  +
15/Sep/2012 331 -54,789  -
31/Jul/2012 55,120 120  +