Momentum & carry combo
Rank winners versus losers on a lookback window; works until crowding, reversals, or a regime shift punishes trend followers.
Overview
Momentum & carry combo sits in the Foreign Exchange (FX) chapter of the systematic catalog. On QUSXFI we treat it as a testable hypothesis: specify entries, exits, sizing, and costs—then ask whether edge survives out-of-sample scrutiny.
Discretionary traders often arrive at similar ideas intuitively; the quantitative version forces you to write the rule before you see the next bar. That discipline is what makes results reproducible—or exposes them as luck.
Based on the research catalog 151 Trading Strategies (Kakushadze & Serur, 2018), section 8.4. Educational summary—not a replication of the full formal definition.
Signal and Portfolio Construction
Momentum & carry combo ranks past winners and losers over a declared lookback, then tilts the book toward persistence.
Before backtesting Momentum & carry combo, write the economic hypothesis in one sentence a risk manager would accept or reject.
Implementation and Research Process
Include at least one documented momentum crash month in Momentum & carry combo evaluation—not optional stress, core diligence.
Slice Momentum & carry combo by vol regime and rate cycle—momentum is conditional, not universal.
Decompose Momentum & carry combo into signal, portfolio construction, and execution modules—each must be path-independent given the same historical tape.
Risk: What Breaks This Strategy
Momentum crashes—sharp reversals after crowded trends—are the signature tail risk of Momentum & carry combo. Factor crowding and ETF flows accelerate the unwind.
Turnover and transaction costs scale with rebalance frequency; what worked gross of fees dies net.
Regime shifts (policy shocks, bear markets) can flip sign on the same lookback parameter that looked brilliant in the prior decade.
Common Mistakes to Avoid
- Reporting Momentum & carry combo backtests without fees, slippage, and realistic fill rules.
- Erasing losing Momentum & carry combo months instead of documenting regime breaks—that is how research firms stop learning.
- Using academic §8.4 definitions for Momentum & carry combo while ignoring borrow, margin, or contract specs.
- Ignoring transaction costs on Momentum & carry combo full-universe rebalances.
How to Study This Strategy
- Simulate Momentum & carry combo at two participation rates; note where capacity binds.
- Write Momentum & carry combo failure triggers: drawdown, turnover spike, sign flip on the signal.
- Codify Momentum & carry combo signal, lag, rebalance, and vol-scaling rules without discretionary overrides.
- Run Momentum & carry combo walk-forward on a liquid universe; export turnover and sector exposures.
- Identify the worst momentum crash month for Momentum & carry combo in-sample and replay it out-of-sample.
Key Takeaways
- Momentum & carry combo ranks past winners and losers—edge is conditional on trend persistence, not guaranteed by the lookback.
- Rebalance frequency and universe for Momentum & carry combo drive turnover; gross returns without fees mislead.
- Sector neutrality changes whether you trade pure trend or a constrained factor portfolio.
- Regime shifts can flip sign on the same parameter that worked in the prior decade.
- Walk-forward Momentum & carry combo; a single in-sample lookback winner is a research accident until confirmed out-of-sample.
Learning Tip
Plot Momentum & carry combo cumulative return with crash months highlighted in red—stakeholders remember color, not Sharpe.
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