At Request of IIROC: NuVista Energy Ltd. is Unaware of Any Material Change

At Request of IIROC: NuVista Energy Ltd. is Unaware of Any Material Change 
CALGARY, ALBERTA -- (Marketwire) -- 03/15/13 -- NuVista Energy Ltd. 
(TSX:NVA) At the request of IIROC on behalf of the Toronto Stock
Exchange NuVista Energy Ltd. ("NuVista") announces that it is not
aware of any material change with respect to NuVista. 
On March 6, 2013 NuVista issued a news release announcing its fourth
quarter and year end 2012 results and on March 12, 2013 issued a news
release announcing its participation in FirstEnergy East Coast Energy
Conference on March 14, 2013 and an updated corporate presentation.
Copies of both news releases are available at www.sedar.com and on
NuVista's website www.nuvistaenergy.com. 
INVESTOR INFORMATION 
NuVista is an independent Canadian oil and natural gas exploration,
development and production corporation with its Common Shares trading
on the Toronto Stock Exchange under the symbol "NVA".
Contacts:
NuVista Energy Ltd.
Jonathan Wright
President and CEO
(403) 538-8501 
NuVista Energy Ltd.
Robert F. Froese
VP, Finance and CFO
(403) 538-8530
www.nuvistaenergy.com