Benchmark Risk and Active Risk Budgets
Budget tracking error, identify overlapping risk drivers, and choose which positions to trim.
These prompts are original practice. They are not questions from a named employer or a live hiring loop.
Active weights
A $100m fund holds 42% industry A, 28% B, and 30% C. Its benchmark holds 35%, 35%, and 30% respectively. Ignore cash and price changes.
1.What is the active weight in A?
2.What is active weight in B?
3.What is active weight in C?
4.What trade neutralizes both nonzero active weights?
5.If A beats B by 4 percentage points, what active contribution follows from these static weights?
6.If the benchmark increases A by 2 points funded from B, what is A's active weight now?
7.What happens to B's active weight after that benchmark change?
8.Why model active and absolute risk separately?
9.What makes the benchmark comparison meaningful?
10.Which update matters even if the PM makes no trades?
Tracking error budget
Two active themes have standalone annual volatilities of 3% and 4%. Their correlation is zero at first. The tracking-error cap is 6%. Use variance = a² + b² + 2ρab.
11.What is portfolio tracking error at zero correlation?
12.How much headroom does the initial forecast show?
13.What if correlation rises to 0.5?
14.Does the 0.5 case meet the cap?
15.What is tracking error at perfect positive correlation?
16.What is tracking error at perfect negative correlation?
17.Which assumption makes an apparent budget surplus fragile?
18.What reduction should be compared before trimming either theme?
19.Why test a separate stressed risk cap or scenario?
20.What should follow an actual trim?
A common growth factor
A software tilt contributes +0.30 active growth-factor beta and a retail tilt +0.25. A utility tilt contributes −0.10. The approved maximum net growth beta is +0.35. Treat betas as additive.
21.What net factor beta is held?
22.How far above the cap is the book?
23.If software alone is trimmed, what beta should it contribute at the boundary?
24.What net beta follows closing the utility tilt instead?
25.If growth factor falls 8%, what first-order active return follows before trades?
26.At the cap, what modeled active return follows that shock?
27.What does the sector breakdown obscure?
28.Which evidence supports keeping a specific tilt?
29.What if the factor hedge also offsets an intentional value exposure?
30.What should be monitored after a benchmark rebalance?
Risk contribution
A risk model reports $4m total active volatility. Euler component contributions are $2.5m for A, $2m for B, and −$0.5m for an offsetting sleeve C. The active volatility cap is $4.5m.
31.What share of total risk comes from A on this attribution?
32.What is the combined contribution from A and B?
33.What headroom does the current book have?
34.What does the negative contribution suggest locally?
35.Can the exact tracking error without C be read from its contribution alone?
36.Which comparison helps rank two possible cuts?
37.What if C loses its offset in a stress?
38.Why reconcile total and component figures?
39.What if A owns two internally offsetting views?
40.What committee language is defensible?
Deciding what to trim
A PM must cut at least 40 bp of forecast tracking error. Candidate A cuts 45 bp and gives up 18 bp of expected alpha at 4 bp cost. Candidate B cuts 50 bp and gives up 12 bp alpha at 7 bp cost. Candidate C cuts 30 bp and gives up 6 bp at 2 bp cost. Assumed impacts are on a common horizon and additive for the cost screen.
41.What is A's total modeled economic cost?
42.What is B's total cost?
43.What is C's total cost?
44.Which single action is cheapest among those meeting the requirement?
45.How much more than required does B cut?
46.If B's trading cost doubles, what is the cheapest compliant single action?
47.Why avoid summing risk reductions for two actions blindly?
48.What could disqualify the cheapest plan operationally?
49.What other concentration check matters after the cut?
50.What should the recommendation include?
Benchmark transition
An index will add a stock at 3% next week, funding it by reducing other weights proportionally. A $200m fund holds none and can stage trades. An interim policy allows at most a 2% active overweight before the effective date.
51.What stock notional matches the future weight at unchanged NAV?
52.What is the maximum permissible pre-effective holding?
53.What residual remains if the fund builds the maximum early?
54.If the price rises 5% with no other changes, what must be checked on the early holding?
55.What is active weight after effectiveness if the fund still holds exactly 2%, ignoring that price rise?
56.What could justify staging?
57.Why track the effective timestamp?
58.What if the index delays the addition?
59.What could reduce last-minute exposure?
60.What performance split helps afterward?
Cash and benchmark beta
A $100m equity fund has $10m cash, $90m in unit-beta benchmark-like stocks, and no overlay. Benchmark beta is one. A futures contract supplies $250k of beta notional.
61.What is the fund's current beta?
62.What is active beta?
63.What hedge notional closes the active beta gap?
64.How many contracts accomplish that?
65.If the benchmark gains 4%, what is the cash-induced first-order active return without hedge?
66.If stocks worth $5m are bought with cash, how many contracts stay to preserve beta of one?
67.What risk does futures basis leave?
68.What should be planned if the cash is needed for a client redemption?
69.Why compare active beta with tracking error?
70.What trigger fits unwinding the overlay?
Time horizon
A committee quotes daily active volatility of 40 bp. Under a simplified independent-return assumption, annualize over 252 sessions by square root of time. A formal annual cap is 6%.
71.What annualized tracking error follows?
72.Does the simplified estimate clear the cap?
73.What daily volatility corresponds to 6% under the assumption?
74.If daily vol drops to 30 bp, what annual estimate follows?
75.What can invalidate naive annualization?
76.What is a useful check on realized tracking error?
77.How can a short sample mislead?
78.What distinguishes forecast from realized risk?
79.What should be checked while transitioning to a new portfolio?
80.What should the PM report to committee?
Deliberate versus incidental risk
An active portfolio is expected to earn 2.0% before cost at 4% tracking error. A proposed factor hedge cuts expected alpha by 0.2 points, costs 0.1 points, and reduces tracking error to 3%. Use expected net alpha divided by tracking error as the simplified information ratio. Ignore other costs.
81.What is baseline simplified information ratio?
82.What net alpha follows the hedge?
83.What ratio follows after the hedge?
84.If the tracking error cap is 3.5%, which stated plan fits?
85.If the hedge costs 0.4 points instead, what net alpha follows?
86.What ratio follows at that higher cost?
87.What if the factor exposure is actually the intended investment view?
88.Which test supports choosing the hedge?
89.Why might a higher information ratio be insufficient?
90.What should be reviewed once priced?
Committee allocation
A team has a 5% tracking-error cap. Current risk is 4.7%. Adding a proposed view raises forecast risk to 5.3%. Adding the view and trimming an existing correlated sleeve produces 4.9%. The new view has expected alpha of 35 bp. Trimming loses 12 bp of existing alpha and the package costs 5 bp.
91.How much headroom exists now?
92.How far is the standalone addition over the cap?
93.What's the package's remaining headroom?
94.What net expected alpha does the package add?
95.What if execution cost rises to 25 bp?
96.What if trimming is confirmed only halfway before the addition?
97.Why stress a correlation move with the new view?
98.How should the recommendation identify accountability?
99.What loss could a liquid proxy hedge leave?
100.What should follow a change in benchmark weights?
101.What closes the review?