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A future is an
exchange-traded
derivative which is
similar to a forward. Both futures and
forwards represent agreements to buy/sell some
underlying asset in the future for a specified price. Both can be for
physical settlement or
cash settlement. Both offer a
convenient tool for hedging or speculation. For little or no initial cash
outlay, both instruments provide price exposure without a need to
immediately pay for, hold or warehouse the underlying asset. In this
sense, both instruments are leveraged. Futures and forwards trade on a
variety of underliers: wheat, oil, live beef, Eurodollar deposits, gold,
foreign exchange, the S&P 500 stock index, etc.
The fundamental difference between futures and forwards is
the fact that futures are traded on exchanges. Forwards trade
over the counter. This has three
practical
implications.
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Futures are standardized instruments. You can
only trade the specific contracts supported by the exchange. Forwards are
entirely flexible. Because they are privately negotiated between parties,
they can be for any conceivable underlier and for any settlement date.
Parties to the contract decide on the
notional amount and whether physical
or cash settlement will be used. If the underlier is for a physically
settled commodity or energy, parties agree on issues such as delivery
point and quality.
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Forwards entail both
market risk and
credit
risk. A counterparty may fail to perform on a forward. With futures, there
is only market risk. This is because exchanges employ a system whereby
counterparties exchange daily payments of profits or losses on the days
they occur. Through these margin payments, a
futures contract's market value is effectively reset to zero at the end of
each trading day. This all but eliminates credit risk.
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The daily cash flows associated
with margining can skew futures prices, causing them to diverge from
corresponding forward prices.
A future is transacted through a brokerage firms that hold
a "seat" on the exchange that trades that particular contract. Working
through their respective brokers, two parties will transact a trade.
Legally, that trade is structured as two trades, both with a
clearinghouse owned by or closely affiliated with the exchange. For example, suppose Party A and Party B trade five May natural
gas futures at USD 3.24. Party A is long
and Party B is short. This would be legally structured as
Party A being long five May natural gas
futures at USD 3.24 with the exchange's clearinghouse being the counterparty; and
The exchange's clearinghouse being long five May natural gas
futures at USD 3.24 with Party B being the counterparty.
Party A and B then have no legal obligation to each other.
Their respective legal obligations are to the exchange's clearinghouse. The
clearinghouse never
takes market risk because it always has offsetting positions with
different counterparties. This is illustrated in Exhibit 1.
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Legally, it is
structured as two transactions.

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Two parties negotiate (through their
respective brokers) a futures transaction. They agree on the price
and the number of contracts. Legally, the transaction is structured
as two contracts, each between one of the parties and the exchange's
clearinghouse.
In this way, the parties are not exposed to each others' credit
risk. There is credit risk between the respective parties and the
clearinghouse, but that is all but eliminated through a margining
process. Because the clearinghouse always takes offsetting positions, it
never takes market risk. |
Before you can trade a futures contract, the broker
collects
a deposit from you called initial margin.
This may be in the form of cash or acceptable
securities. The broker holds this
deposit for you in a
margin account and, in the case of a cash deposit, credits interest on the balance. The amount of initial margin is determined according to a formula
set by the exchange. For a single futures contract, it will be a small fraction of
the market value of the futures' underlier. For
futures spreads, or if you are using
futures to hedge a physical position in the underlier, initial margin may
be even lower. Generally, initial margin is intended to represent the
maximum one-day net loss you could reasonably be expected to incur on a
position.
Every day, the profit or loss is calculated on your
futures position. If a loss, your broker transfers that amount from your
margin account to the clearinghouse. If a profit, the clearinghouse transfers that
amount to your broker who then deposits it into your margin account. This
is the daily margining process. The clearinghouse's margin cash flows net to
zero. For every margin payment it receives from one party, it makes an
offsetting margin payment to another party.
Through the margining process, futures
settle every day. Unlike a forward, where all
contract obligations are satisfied at maturity, obligations under the
futures contract are satisfied every day on an ongoing basis as
mark-to-market profits or losses are realized. This essentially eliminates
credit risk for futures.
The calculation of the daily profit or loss for margin
purposes is straightforward. On the day a futures position is first
entered into, the formula for each contract is
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(notional) (today's settlement price – transaction price) |
[1] |
On all subsequent days, the formula becomes
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(notional) (today's settlement price – yesterday's settlement price) |
[2] |
Settlement prices
are official prices calculated by the exchange at the close of trading for
the purpose of making margin calculations. Formulas vary and may depend
upon how active trading was at the close. Generally, settlement prices are
calculated as some average of transaction prices immediately before the
close of trading or as some average of indicative quotes obtained from
traders at the close.
Maintenance margin
is some fraction—perhaps 75%—of initial margin for a position. Should the
balance in your margin account fall below the maintenance margin, your
broker will require that you deposit funds or securities sufficient to restore the
balance to the initial margin level. Such a demand is called a
margin call. The additional deposit is
called variation margin. Should
you fail to make a variation margin payment, your broker will
immediately liquidate some or all of your positions.
Note that the margin payments made in daily settlement of
a future are not collateral in a legal sense.
When a party posts collateral to, say, secure an OTC derivative
obligation, that party legally still owns the collateral. With futures
contracts, money transferred from a margin account to an exchange as a
margin payment legally changes hands. A deposit in a margin account at a
broker is collateral. It legally still belongs to the client, but the
broker can take possession of it any time to satisfy obligations arising
from the client's futures positions.
There are four ways to close out a futures contract:
Offset is the
transaction of a reversing trade on the exchange. If you are short 20
March soybean futures traded on the Chicago Board of Trade, you can close
the position by taking an offsetting long position in 20 March soybean
contracts on the same exchange. There will be a final margining at the end
of the day, and then the position will be closed.
Cash settlement is simply the holding of a
cash settled future until expiration. At that time, there is a final
margin payment, and the contract expires.
Delivery is the holding of a physically
settled future until it physically settles according to exchange rules.
Exchange
for physicals (EFP) is a form of privately negotiated physical
settlement of long and short futures positions held by two parties.
Every futures contract has a last trade date and a
delivery period specified by the exchange. In the case of a cash settled
future, the delivery period is the last trade date. On that date, the
settlement price is set equal to the cash price of the underlier. There is
a final margining based on that settlement price, and then the contract
expires.
For physically settled futures, exchange rules depend upon
the specific underlier. Usually, there is an entire month—called the
delivery month—during which delivery may
occur. The last trading day for the future falls towards the end of that
month. A party that is short a future may elect to deliver the underlier
on any business day in the delivery month. Typically,
notice of delivery must be made to
the exchange two business days prior to delivery. The date on which notice
is given is called the notice date. The
first possible date for notice comes towards the end of the month
preceding the delivery month. It is called the
first notice date. Upon receiving
notice of delivery, the exchange selects a party that is long the future
to take the delivery. This may be the party with the largest long position
in the future. Alternatively, the party to take delivery may be selected
by lot.
The vast majority of futures contracts are traded by
hedgers or speculators with no interest in taking or delivering the
underlier. Such parties holding long futures will offset them prior to the
first notice date. Those with short positions will offset them by the last
trade date. Most futures are closed out by offset.
Exchanges specify conditions of delivery. These include
acceptable locations for delivery, in the case of commodities or energies.
It includes specifics about the quality, grade or nature of the underlier
to be delivered. For example, only certain
Treasury bonds may be delivered
under the Chicago Board of Trade's Treasury bond future. Only certain
growths of coffee may be delivered under the Coffee, Sugar and Cocoa
Exchange's coffee future.
In many commodity or energy markets, parties want to
settle futures by delivery, but exchange rules are too restrictive for
their needs. For example, the New York Mercantile Exchange requires that
natural gas be delivered at the Henry Hub in Louisiana. Suppose two
parties need to buy/sell gas at some other hub and have transacted futures
to hedge against price movements prior to the transaction. What should
they do?
One answer is that they could privately negotiate the
trade and then reverse their futures positions by offset. This requires
that they take price risk during the period between closing the physical
trade and offsetting their respective futures positions. Many exchanges
offer an alternative called exchange for physicals (EFP). The mechanics of
EFP vary by exchange. Generally, the parties privately negotiate their
physical trade. Then, instead of offsetting their futures hedges with
trades on the exchange, they inform the exchange that they want to
transfer the futures from one party to the other, closing out their
respective positions. Essentially, EFP is customizable physical
delivery.
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collateral
Assets held to secure an obligation.
derivative
instrument An instrument
which derives value from the value of some commodity, energy, or other financial
instrument.
forward contract
A trade that is agreed to at one point in time but will
take place at some later time.
futures spread A long-short
futures position.
managed futures
Portfolios of forwards or futures managed as an "alternative asset category."
option
A type of derivative instrument.
settlement In finance, performance
on a contractual obligation.
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Kolb (1998)
is the standard introductory text on futures. Das (2003)
is the authoritative reference on derivatives. Both provide
extensive information on futures.
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