text: **Market Risk**
  Market 
  risk is the risk that changes in market prices, such as 
  fluctuations in the market prices of our publicly traded investments, our 
  share price, foreign exchange rates and interest rates, will affect our 
  income, cash flows or the value of our financial 
  instruments. The 
  derivative instruments we use to manage this risk are described in 
  note 2. 
  
  At December 31, 2013, a $1 change in the market price of our Class B 
  Non-Voting shares would not have any impact on net income or other 
  comprehensive income, 
  including the impact related to our Equity 
  Derivatives. 
  
  *Foreign Exchange and Interest Rates*
  We use Debt Derivatives to manage risks from fluctuations in foreign 
  exchange and interest rates associated with our US dollar denominated 
  debt instruments, designating the derivatives as hedges of specific debt 
  instruments 
  and accounting purposes. We use 
  Expenditure Derivatives to manage the foreign exchange risk in our 
  operations, designating them as hedges for certain of our operational 
  and capital expenditures. 
  
  *Publicly Traded Investments*
  We manage risk related to fluctuations in the market prices of our 
  investments in publicly traded companies by regularly reviewing publicly 
  available information related to these investments to ensure that any 
  risks are within our established levels of risk tolerance. We do not 
  routinely engage in risk management practices such as hedging, 
  derivatives or 
  to our publicly traded 
  investments. 
  
  for  economic 