As a PS - don;t get hooked up on the technicals of valuation, CHC is worth $1.1m (million) according to the OTC exchange using the shares x value of shares valuation. The shares are still trading, (up 13% last week no less).
Here for the link to the exchange website:
HELIQ CHC Group Ltd.: Summary, Stock Quote & Trades for CHC Group Ltd. - OTCMarkets.com
The q added to the ticker code (HELIQ) denotes the bankruptcy.