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benchmark-tracking
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skills/portfolio/benchmark-tracking/SKILL.md
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# Benchmark Tracking
> Index tracking and replication strategies — full replication, sampling, and optimization.
## When to Activate
- User is building an index-tracking portfolio or ETF
- Minimizing tracking error against a benchmark with fewer securities
- Understanding ETF creation/redemption mechanics
- Handling index reconstitution and rebalancing events
- Evaluating tracking error sources and budgeting
## Core Concepts
### Replication Methods