mgt 821/econ 873 financial derivatives lecture 2 futures and forwards
TRANSCRIPT
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MGT 821/ECON 873
Financial Derivatives
Lecture 2Futures and Forwards
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Alternative ways to buy a stock Process has three components
Fixing the price Buyer making payment to the seller The seller transferring ownership of the share to
the seller Alternative ways
Outright purchase Fully leveraged purchase Prepaid forward contract Forward contract
Financial Derivatives W. Suo
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Futures - similar to forward but feature formalized and standardized characteristics Agreement to buy or sell an asset for a certain price at a certain time
Whereas a forward contract is traded OTC a futures contract is traded on an exchange
Key difference in futures Exchange traded Specifications need to be defined:
What can be delivered, Where it can be delivered, When it can be delivered
Settled daily
Futures
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Futures price - agreed-upon price at maturity Long position - agree to purchase Short position - agree to sell Profits on positions at maturity
Long = spot minus original futures price
Short = original futures price minus spot
Key Terms for Futures Contracts
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Agricultural commodities Metals and minerals (including energy
contracts) Foreign currencies Financial futures
Interest rate futures
Stock index futures
Types of Contracts
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Examples of Futures Contracts
Agreement to: buy 100 oz. of gold @ US$600/oz. in
December (COMEX) sell £62,500 @ 1.5000 US$/£ in March
(CME) sell 1,000 bbl. of oil @ US$110/bbl. in April
(NYMEX)
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Clearinghouse - acts as a party to all buyers and sellers. Obligated to deliver or supply delivery
Closing out positions Reversing the trade Take or make delivery Most trades are reversed and do not involve actual
delivery
Trading Mechanics
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Initial Margin - funds deposited to provide capital to absorb losses
Marking to Market - each day the profits or losses from the new futures price are reflected in the account.
Maintenance or variation margin - an established value below which a trader’s margin may not fall.
Margin and Trading Arrangements
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Margin call - when the maintenance margin is reached, broker will ask for additional margin funds See http://www.interactivebrokers.com/en/trading/marginRequirements/margin_amer.php?
ib_entity=ca
Convergence of Price - as maturity approaches the spot and futures price converge
Delivery - Actual commodity of a certain grade with a delivery location or for some contracts cash settlement
Margin and Trading Arrangements
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Example of a Futures Trade
On June 5, An investor takes a long position in 2 December gold futures contracts on COMEX division of the New York Mercantile Exchange (NYMEX) contract size is 100 oz. futures price is US$600 /ounce margin requirement is US$2000/contract (US$4,000 in total) maintenance margin is US$1,500/contract (US$3,000 in total)
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Key Points About Futures
They are settled daily Closing out a futures position involves entering into
an offsetting trade Most contracts are closed out before maturity
If a contract is not closed out before maturity, it usually settled by delivering the assets underlying the contract.
When there are alternatives about what is delivered, where it is delivered, and when it is delivered, the party with the short position chooses.
A few contracts (for example, those on stock indices and Eurodollars) are settled in cash
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Convergence of Futures to Spot
Time
(a)
FuturesPrice
Spot Price
Time
(b)
FuturesPrice
Spot Price
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Forward Contracts vs Futures Contracts
Private contract between 2 parties Exchange traded
Non-standard contract Standard contract
Usually 1 specified delivery date Range of delivery dates
Settled at maturity Settled daily
Delivery or final cashsettlement usually occurs
Contract usually closed outprior to maturity
FORWARDS FUTURES
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Forward and Futures Prices Short Selling
Short selling involves selling securities you do not own
Your broker borrows the securities from another client and sells them in the market in the usual way
At some stage you must buy the securities back so they can be replaced in the account of the client
You must pay dividends and other benefits the owner of the securities receives
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Consumption vs Investment Assets
Investment assets are assets held by significant numbers of people purely for investment purposes (Examples: gold, silver)
Consumption assets are assets held primarily for consumption (Examples: copper, oil)
One can short sell investment assets, but not consumptions assets
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Notation
S0: Spot price today
F0: Futures or forward price today
T: Time until delivery date
r: Risk-free interest rate for maturity T
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Forward Prices
For any investment asset that provides no income and has no storage costs
F0 = S0erT
What if it doesn’t hold? When an investment asset provides a known
dollar income
F0 = (S0 – I )erT
where I is the present value of the income
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When an Investment Asset Provides a Known Yield
F0 = S0 e(r–q )T
where q is the average yield during the life of the contract (expressed with continuous compounding)
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Valuing a Forward Contract
Suppose that K is delivery price in a forward contract
F0 is forward price that would apply to the contract today
The value of a long forward contract, ƒ, is ƒ = (F0 – K )e–rT
Similarly, the value of a short forward contract is
(K – F0 )e–rT
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Forward vs Futures Prices Forward and futures prices are usually
assumed to be the same. When interest rates are uncertain they are, in theory, slightly different:
A strong positive correlation between interest rates and the asset price implies the futures price is slightly higher than the forward price
A strong negative correlation implies the reverse
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Stock Index
Can be viewed as an investment asset paying a dividend yield
The futures price and spot price relationship is therefore
F0 = S0 e(r–q )T
where q is the dividend yield on the portfolio represented by the index
What about foreign stock index?
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Futures and Forwards on Currencies
A foreign currency is analogous to a security providing a dividend yield
The continuous dividend yield is the foreign risk-free interest rate
It follows that if rf is the foreign risk-free interest rate
Trr feSF )(00
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Futures on Consumption Assets
F0 S0 e(r+u )T
where u is the storage cost per unit time as a percent of the asset value.
Alternatively,
F0 (S0+U )erT
where U is the present value of the storage costs.
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The Cost of Carry
The cost of carry, c, is the storage cost plus the interest costs less the income earned
For an investment asset F0 = S0ecT
For a consumption asset F0 S0ecT
The convenience yield on the consumption asset, y, is defined so that F0 = S0 e(c–y )T
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Hedging Strategies Using Futures
A long futures hedge is appropriate when you know you will purchase an asset in the future and want to lock in the price
A short futures hedge is appropriate when you know you will sell an asset in the future & want to lock in the price
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Basis Risk
Basis is the difference between spot & futures
Basis risk arises because of the uncertainty about the basis when the hedge is closed out
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Long Hedge
Suppose that
F1 : Initial Futures Price
F2 : Final Futures Price
S2 : Final Asset Price You hedge the future purchase of an asset by
entering into a long futures contract Cost of Asset=S2 –(F2 – F1) = F1 + Basis
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Short Hedge
Suppose that
F1 : Initial Futures Price
F2 : Final Futures Price
S2 : Final Asset Price You hedge the future sale of an asset by
entering into a short futures contract Price Realized=S2+ (F1 –F2) = F1 + Basis
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Choice of Contract
Choose a delivery month that is as close as possible to, but later than, the end of the life of the hedge
When there is no futures contract on the asset being hedged, choose the contract whose futures price is most highly correlated with the asset price. There are then 2 components to basis
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Optimal Hedge RatioProportion of the exposure that should optimally
be hedged is
where
S is the standard deviation of S, the change in the spot price during the hedging period,
F is the standard deviation of F, the change in the futures price during the hedging period is the coefficient of correlation between S and F.
h S
F
*
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Hedging Using Index Futures
To hedge the risk in a portfolio the number of contracts that should be shorted is
where P is the value of the portfolio, is its beta, and A is the value of the assets underlying one futures contract
P
A
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Reasons for Hedging an Equity Portfolio
Desire to be out of the market for a short period of time. (Hedging may be cheaper than selling the portfolio and buying it back.)
Desire to hedge systematic risk (Appropriate when you feel that you have picked stocks that will outperform the market.)
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Example
S&P 500 is 1,000
S&P 500 futures price is 1,010
Value of Portfolio is $5.05 million
Beta of portfolio is 1.5
What position in futures contracts on the S&P 500 is necessary to hedge the portfolio? F=250*1,010=252,500, and thus
1.5*5,050,000/252,000=30
Contracts are needed to short
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Changing Beta
What position is necessary to reduce the beta of the portfolio to 0.75?
What position is necessary to increase the beta of the portfolio to 2.0?