Relative Strength Versus the Benchmark: The First Non-Negotiable Filter
High-momentum screening begins with relative strength, not absolute price change. A stock rising 30% while its sector ETF rises 45% is lagging, not leading. Calculate the relative strength line by dividing the stock’s price by a benchmark index price (SPY for U.S. equities, or the relevant sector SPDR for concentrated screens). The line should make higher highs over 3, 6, and 12 months simultaneously. Quantify with the Mansfield Relative Strength indicator: divide the ratio by its 52-week moving average, subtract 1, and multiply by 100. Readings above zero confirm outperformance; readings above 20 signal leadership worth screening. Rank all candidates by 12-month relative strength and keep only the top decile—momentum’s documented persistence is strongest in this cohort, per Jegadeesh and Titman’s foundational research on cross-sectional momentum.
Price Above Rising Moving Averages: Defining the Trend Skeleton
Momentum without trend structure is noise. Require price above the 20-, 50-, and 200-day exponential moving averages simultaneously. Exponential averages weight recent sessions more heavily, making them more responsive to fresh institutional accumulation than simple averages. The 50-day EMA must sit above the 200-day EMA—the classic “golden cross” configuration—and both must slope upward over the prior 20 sessions. Slope matters more than position: a stock pinned above a flattening 200-day EMA is consolidating, not advancing. Measure slope by comparing the EMA’s current value to its value 10 and 20 sessions ago; require positive deltas on both. This triple-filter eliminates mean-reverting bounce candidates and isolates stocks where trend, position, and trajectory align.
52-Week High Proximity: Exploiting the Anchoring Bias
Stocks within 25% of their 52-week high outperform stocks far below it—a robust anomaly across global markets documented by George and Hwang. The mechanism is behavioral: investors anchor to prior highs and resist selling until price recovers, suppressing supply. Screen for price at least 75% of the 52-week high, with a tighter 90% threshold for aggressive momentum sleeves. Pair this with a 52-week low filter: reject any stock up more than 100% from its low in under three months, which flags exhaustion gaps rather than durable accumulation. The sweet spot is a stock grinding from a base toward its high on controlled volume—constructive pressure, not a vertical spike.
Volume Expansion and Accumulation/Distribution
Price advances require sponsorship. Screen for current volume at least 40% above the 50-day average volume during up weeks, and require up-week volume to exceed down-week volume over the trailing eight weeks. The Accumulation/Distribution line—cumulative volume weighted by each session’s close position within its range—should confirm price by printing higher highs alongside price highs. Divergence is disqualifying: if price makes a new high while A/D stalls or declines, distribution is occurring beneath the surface, and institutional sellers are feeding shares into strength. Incorporate the Up/Down Volume Ratio (50-day up volume divided by 50-day down volume); readings above 1.2 indicate net accumulation and belong on your shortlist.
Breakout Confirmation With Volatility-Adjusted Metrics
Momentum screens frequently generate false positives from low-volatility drift. Normalize price change by volatility using the Sharpe-like momentum ratio: 63-day return divided by 63-day annualized standard deviation. Rank candidates by this ratio to surface stocks delivering consistent, low-noise gains rather than erratic spikes. For breakout entries, require price to clear a defined resistance zone (prior swing high or consolidation ceiling) on volume at least 150% of average, with an Average True Range expansion above 1.2x its 20-day mean. ATR expansion confirms genuine range breakout, while contracting ATR into resistance signals coiled—but unconfirmed—tension.
Earnings and Catalyst Alignment
Technical momentum rarely persists through negative fundamental surprises. Overlay an earnings filter: require positive earnings surprise in the two most recent quarters and upward estimate revisions over the past 60 days. The post-earnings announcement drift literature shows prices continue drifting in the direction of surprise for weeks—technical momentum and fundamental surprise reinforce each other. Screen out stocks within five trading days of a scheduled earnings report unless you accept gap risk; momentum screens are trend-following tools, not event bets. Cross-reference the earnings calendar and note report dates on every candidate before entry.
Liquidity, Short Interest, and Squeeze Dynamics
Momentum screens fail in illiquid names where spreads erase edge. Require average daily dollar volume above $20 million and price above $10. Check short interest: readings between 10% and 25% of float add fuel—short covering amplifies advances—but above 30% introduces violent, unpredictable reversals. Use days-to-cover (short interest divided by average volume) as the practical gauge; values between 2 and 5 offer squeeze potential without reflexive chaos. Avoid stocks with float under 20 million shares unless you can tolerate extreme slippage.
Composite Scoring and Portfolio Construction
Rank every passing candidate on a weighted composite: 30% relative strength rank, 25% proximity to 52-week high, 20% volume accumulation score, 15% volatility-adjusted momentum, 10% earnings revision score. Rebalance the screen weekly, not daily—momentum signals decay slowly and weekly cadence controls turnover costs. Hold 15–25 names, cap any single position at 8%, and set a hard exit rule: sell when price closes below the 50-day EMA for three consecutive sessions or when relative strength rank falls out of the top 30%. Momentum’s crash risk is real; the exit rule is your circuit breaker, not a suggestion. Backtest each parameter change on at least ten years of data including 2008 and 2020 to verify the screen survives regime shifts, and paper-trade any new filter for one quarter before committing capital.
