Learning Module 4 Arbitrage, Replication, and the Cost of Carry in Pricing Derivatives
50 questions available
Key Points
- Spot-forward parity: F0(T) = S0(1 + r)^T when no carry
- Arbitrage arises if S0 != PV of known future price
- Replication: long forward = buy spot + borrow; short forward = sell spot short + lend
- Adjust forwards for PV of income and costs: F0(T) = [S0 - PV(income) + PV(costs)](1+r)^T
- Continuous form: F0(T) = S0 e^{(r + c - i)T}
Key Points
- If S0 < PV(ST) an arbitrage is: borrow, buy spot, sell forward
- If S0 > PV(ST) an arbitrage is: sell spot short, invest proceeds, buy forward (or buy back later)
- Examples include gold storage cost adjustments and FX replication
- Practical limits: transaction costs, margin, liquidity, counterparty risk
Key Points
- FX forward parity: F0,f/d(T) = S0,f/d e^{(r_f - r_d)T}
- Replication: borrow domestic, buy foreign, lend foreign; implies forward from interest differential
- Forward prices reflect relative funding rates (use repo for collateralized financing)
Key Points
- Bootstrapping: derive zero (spot) rates from coupon bond prices, then compute discount factors
- Implied forward rate formula: (1 + z_A)^A * (1 + IFR_{A,B-A})^{(B-A)} = (1 + z_B)^B
- FRAs and swap rates derive from implied forward rates
Key Points
- Transaction costs, margin, funding constraints, liquidity and credit risk can prevent arbitrage
- Use repo or collateralized rates where appropriate rather than unsecured borrowing rate
- Central clearing and margining for OTC derivatives reduces forward-futures cash flow differences
Questions
A non-dividend-paying stock trades at spot price S0 = 120. The annual risk-free rate (discrete) is 4% and a one-year forward on the stock trades at 124.80. Is there an arbitrage opportunity, and if so, what arbitrage trade and profit per share would realize? Assume no transactions costs.
View answer and explanationA commodity spot price S0 = 50 has a known storage cost of 2 payable at T = 0.5 years. Risk-free rate r = 3% annual (discrete). Compute the no-arbitrage forward price F0(0.5).
View answer and explanationYou observe EUR/JPY spot S0 = 130.50 (JPY per EUR). The one-year EUR risk-free rate = -0.2% and the one-year JPY rate = 0.5% (continuous compounding). What is the one-year forward EUR/JPY no-arbitrage rate (continuous)?
View answer and explanationA two-period zero rate z1 = 2% (one year), z2 = 3% (two years). Compute the implied one-year forward rate one year from now (IFR1,1) using discrete compounding.
View answer and explanationAn asset has S0 = 200. The continuous risk-free rate r = 1% p.a. There is a continuous dividend yield i = 3% p.a. for T = 0.5 years. What is the continuous-compounding forward price F0(T)?
View answer and explanationYou can borrow in USD at 2% and in EUR at 0.5% (both continuous). Spot EUR/USD = 1.10 (USD per EUR). Using continuous rates, what is the six-month EUR/USD forward rate?
View answer and explanationAssume a commodity S0 = 300, storage cost payable at time T of 6, and convenience yield negligible. Risk-free rate r = 3% (annual discrete). For T = 1 year, compute F0(T).
View answer and explanationInvestor A can borrow at repo rate 1.5% (annual) and lend at 1.4% unsecured. S0 = 100, risk-free (repo) r = 1.5%. One-year forward F_obs = 102.00. Is arbitrage possible ignoring other frictions? If so, what trade? Use discrete compounding.
View answer and explanationA 6-month equity index forward has price F0(T) = 10200. Spot S0 = 10000. The continuous risk-free rate r = 2% and continuous dividend yield of index i = 0.5%. Check if forward price satisfies continuous no-arbitrage. Compute theoretical F0(T).
View answer and explanationA zero-coupon bond paying 100 in two years trades at 94.0. What is the two-year zero rate z2 (annual discrete)?
View answer and explanationA trader sees a one-year forward on gold at 1,800 with spot 1,760. The one-year risk-free rate is 2% and storage cost PV is 5. Is there arbitrage? If yes, which trade yields profit?
View answer and explanationA bond has a face value 100, annual coupon 4, price 98. If one-year zero z1 = 1.5%, solve for two-year zero z2 given price and coupons (discrete).
View answer and explanationSpot S0 = 80, forward F0(T) for T=0.5 years is 82. You can borrow at 4% continuously. Is there an arbitrage? If so, what trade? Use continuous compounding.
View answer and explanationAn investor sees a three-month forward on an equity index with S0 = 5000, dividend yield annual i = 2%, and continuous risk-free rate r = 3%. Using continuous compounding, compute the 3-month forward.
View answer and explanationAn asset with no income has S0 = 250 and implied one-year forward F0 = 260. What is the implied discrete annual risk-free rate r used by the market (solve for r)?
View answer and explanationA six-month forward on a dividend-paying stock has F0 = 52, S0 = 50, and a PV of expected dividend over six months equals 0.5. Risk-free rate (semi-annual discrete) is r = 1%. Does forward satisfy no-arbitrage? Compute theoretical F0.
View answer and explanationYou observe two identical zero-coupon bonds from same issuer: Bond A maturing at T pays 100 and trades at 97.5; Bond B with same maturity trades at 97.0. What arbitrage exists?
View answer and explanationA forward commitment to buy 100 shares at F0(T) is replicated by borrowing S0 and buying 100 shares. If S0 = 120, r = 3% p.a., T=1 year, show the replicating cash flows and confirm equality at T if F0(T) = S0(1 + r).
View answer and explanationA forward on currency AUD/USD spot = 0.7500. AUD rate = 1% p.a., USD rate = 2% p.a. (both discrete). For a one-year forward, what is F (USD per AUD)?
View answer and explanationA trader notices a one-year forward on a commodity in contango (F > S). Which combination of carry elements could explain this (select the best explanation)?
View answer and explanationIf the convenience yield on oil rises sharply due to low inventories, what is the likely direction of the oil forward curve (short-term) assuming other variables constant?
View answer and explanationA one-year forward on a non-dividend paying equity is priced at 110, while S0 = 100 and risk-free r = 8% (discrete). Ignoring frictions, does arbitrage exist? If yes, indicate profit per share and trade.
View answer and explanationWhich of the following best describes why forward and futures prices could differ for the same underlying and maturity?
View answer and explanationGiven a spot S0 = 400 and continuous r = 3% with no income, what must F0(T) be for a six-month forward to preclude arbitrage under continuous compounding?
View answer and explanationA trader wants to create a synthetic long forward on a non-dividend stock using spot and bonds. Which pair of trades at t=0 replicates a long forward with delivery at T?
View answer and explanationA spot gold price is $1,900/oz, no storage, r = 1% (continuous). A 3-month futures contract trades at 1,905. Is this consistent with no-arbitrage? Compute theoretical continuous forward and conclude.
View answer and explanationA three-month forward on GBP/USD is 1.3000 with spot 1.2800. If the USD 3-month rate is 0.5% and GBP 3-month rate is 0.1% (both discrete annualized), check if forward matches interest differential approximation. Compute implied forward via discrete formula.
View answer and explanationA forward on a bond with known coupon payments must reflect which additional items when pricing the forward compared with a non-coupon asset? Choose best answer.
View answer and explanationWhich of the following is the correct discrete formula for forward price when the underlying pays known cash income amounts I_k at times t_k before T and has known costs C_j at times u_j before T?
View answer and explanationA trader sees a mispriced forward: S0 = 50, PV(dividend to be paid at 0.25) = 1, r = 4% discrete, T = 0.5 year. The forward traded at 52.20. Compute theoretical forward and indicate whether selling the forward and buying spot financed is profitable.
View answer and explanationA forward on USD/JPY is quoted as JPY per USD. Spot S0 = 110, USD rate = 0.5% discrete, JPY rate = -0.1% discrete, T = 1 year. Compute F0.
View answer and explanationWhen storage costs increase materially for a commodity, what immediate effect should you expect on the forward term structure, all else equal?
View answer and explanationA one-year forward on EUR/GBP is trading at 0.85 (GBP per EUR). Spot S0 = 0.84. Market-implied forward from rates is 0.842. What arbitrage exists ignoring frictions?
View answer and explanationAssume S0 = 500, r = 3% (annual discrete), no carry. A two-year forward observed price is 530. Is this consistent? If not, what arbitrage trade yields profit? (Compute theoretical and indicate trade.)
View answer and explanationWhich of the following best describes the cost-of-carry expression in continuous form for an underlying with continuous income yield i and continuous storage cost c?
View answer and explanationA forward contract has price F0(T) equal to PV(ST) discounted by risk-free rate. Which of the following statements is true for an asset with no additional cash flows?
View answer and explanationA dealer hedges a client forward sale by entering an equal and opposite futures position on a liquid exchange. What practical effect does daily margining have on dealer exposure relative to the forward?
View answer and explanationA forward contract on a currency has price F0 = 1.50 (price currency per base). If the market’s spot S0 = 1.46 and continuous interest differentials imply forward should be 1.455, what theoretical arbitrage trade would you execute ignoring frictions?
View answer and explanationA forward contract on a physical commodity is priced noticeably below the spot (F < S). Which of the following is a plausible explanation?
View answer and explanationA one-year forward on a non-dividend stock is priced at 104 while spot is 100 and risk-free rate is 4% (discrete). A market participant borrows at 4%, buys the stock, and sells forward. Which of the following describes the position's profit at maturity if ST = 110?
View answer and explanationAn investor compares a one-year forward priced at F0 = 150 on an index that pays no income, with an 1-year collateralized repo rate (used as r) of 3%. Spot S0 = X. Solve S0 if F0 = S0(1 + r).
View answer and explanationA dealer who centrally clears OTC forwards must post margin to CCP. How does this development change theoretical pricing differences between forwards and futures?
View answer and explanationIf interest rates are constant over the life of a contract, what is the expected relationship between forward and futures prices for identical underlying and maturity?
View answer and explanationWhich funding rate is most appropriate to use when pricing a collateralized forward contract executed via repo financing?
View answer and explanationA stock pays a discrete dividend of $2 in 3 months. S0 = 60, r = 2% per annum (discrete), T = 6 months. Compute the forward price F0(T).
View answer and explanationWhich statement correctly summarizes how the cost of carry affects the spot-forward relationship for equities, FX, bonds, and commodities?
View answer and explanationIf an investor expects ST to be substantially higher than F0(T), which forward strategy is optimal to profit from this view while keeping no initial cash outlay?
View answer and explanationA stock index futures price converges to spot as contract approaches expiration. Which principle explains this behavior?
View answer and explanationYou observe a one-year forward on an index F0 = 2000, spot S0 = 1900, and PV(dividends in year) = 30. What implied discrete annual r is the market using (compute r)?
View answer and explanationWhich of the following best summarizes the primary reason a forward contract's value to either party can become positive or negative between inception and maturity?
View answer and explanation