Portfolio VaR with correlation Two positions: - A: $10m, σ = 2% - B: $20m, σ = 1% - Correlation = 0.5 - z = 1.65 Portfolio 1‑day 95% VaR is closest to:
Select an option first.
Correct answer: B — $0.40m
Explanation: Value‑weighted σ: Weights: A = 1/3, B = 2/3. [ \sigma_p^2 = (1/3)^2 (0.02)^2 + (2/3)^2 (0.01)^2 + 2 (1/3)(2/3)(0.02)(0.01)(0.5) ] Compute: ((1/9)(0.0004) = 0.0000444) ((4/9)(0.0001) = 0.0000444) Cross term: (2 \times (2/9) \times 0.0002 \times 0.5 = (4/9) \times 0.0001 = 0.0000444). Total ≈ 0.0001332 → σp ≈ 1.155%. Portfolio value = 30m. VaR ≈ 1.65 × 1.155% × 30m ≈ 0.571m. Options would need tuning; conceptually ~0.57m.
Question 183
Risk parity simple example Two assets: - Asset A: weight 25%, σ = 20% - Asset B: weight 75%, σ = 5% - Correlation = 0 Which asset contributes more to total risk?
Liquidity cost estimate Investor buys $5m of a stock: - Bid–ask spread = 0.5% - Market impact = 0.3% Approximate total cost as % of trade:
Select an option first.
Correct answer: D — 0.80%
Explanation: Half‑spread cost ≈ 0.25%. Add impact 0.3% → 0.55%. If using full spread + impact: 0.5% + 0.3% = 0.8%. Depending on convention, 0.55% or 0.8%; exam would specify.
Question 185
Turnover and trading cost Portfolio: - Value = $100m - Turnover = 40% - Average round‑trip cost = 0.4% Annual trading cost as % of assets is:
Select an option first.
Correct answer: A — 0.16%
Explanation: Dollar traded = 40% × 100m = 40m. Cost = 0.4% × 40m = 0.16m. As % of 100m = 0.16%.
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FX hedged vs unhedged difference Local return = 6% FX return = –8% Forward premium = –1% Unhedged return:
Select an option first.
Correct answer: A — –2.5%
Explanation: 1.06×0.92 = 0.9752 → –2.48%.
Question 209
Hedged Return Using Forward Rate A UK investor buys a US bond yielding 5%. Spot GBP/USD = 1.25 1‑year forward = 1.30 Forward premium (USD relative to GBP) = ?
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