News
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Announcing: BTS Market Seasonality Research System
BTS Market Seasonality Research System unifies eight views across indexes, ETFs and stocks so seasonal evidence is easier to compare.
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If It Isn’t Backtested, Stop Using It
Backtested evidence, not polished chart examples, should determine whether an indicator earns a place in a real-money trading process.
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BTS Heatmaps: Standardized Market Seasonality
Seasonality becomes comparable across eight BTS Heatmap views using shared metrics, BTS Strength/Weakness Zones and standardized backtests.
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BTS Strength Zones — U.S. Sector ETFs Backtest Results
BTS Strength Zones — U.S. Sector ETFs produced 18.7% CAGR versus 10.6% for buy-and-hold SPY over the 2005–2025 backtest period.
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BTS Strength Zones — S&P 100 Stocks Backtest Results
BTS Strength Zones — S&P 100 Stocks produced 36.1% CAGR versus 11.3% for buy-and-hold SPY over the 2003–2025 backtest period.
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BTS Strength Zones — Nasdaq-100 Stocks Backtest Results
BTS Strength Zones — Nasdaq-100 Stocks produced 47.1% CAGR versus 11.3% for buy-and-hold SPY over the 2003–2025 backtest period.
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BTS Strength Zones — U.S. Major Index ETFs Backtest Results
BTS Strength Zones — U.S. Major Index ETFs produced 14.5% CAGR versus 10.6% for buy-and-hold SPY over the 2004–2025 backtest period.
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BTS Strength Zones — U.S. Industry ETFs Backtest Results
BTS Strength Zones — U.S. Industry ETFs produced 27.0% CAGR versus 11.3% for buy-and-hold SPY over the 2003–2025 backtest period.
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BTS Strength Zones — Dow-65 Stocks Backtest Results
BTS Strength Zones — Dow-65 Stocks produced 32.0% CAGR versus 11.3% for buy-and-hold SPY over the 2003–2025 backtest period.
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BTS Strength Zones — International Country ETFs Backtest Results
BTS Strength Zones — International Country ETFs produced 24.8% CAGR versus 11.3% for buy-and-hold SPY over the 2003–2025 backtest period.
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What Makes a Backtest Reliable?
A reliable backtest does more than produce a chart. See the fidelity, frictions, benchmarks and limits that make results worth trusting.
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Announcing: BTS Strength/Weakness Zones
BTS Strength/Weakness Zones flag unusual multi-week strength or weakness versus the S&P 500 so standout seasonal periods are easier to spot.
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Announcing: BTS Heatmaps
BTS Heatmaps make seasonality easier to compare across indexes, ETFs and stocks with shared metrics and BTS Strength/Weakness Zones.
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How BTS Supports AI Agents and Systems
Backtested Strategies gives AI agents a research layer: standardized backtests, source hierarchy, methodology and exact evidence.
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Why Your Backtest Fails in Live Trading
A backtest can look convincing and still fail live. See how timing, costs, slippage, liquidity and overfitting can destroy the edge.
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Why Backtest Headlines Aren’t Enough
Backtest headlines strip away methodology, structure and evidence—the exact context serious investors need before trusting a result.
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What a Proxy Backtest Can (and Can’t) Tell You
A Proxy Backtest can answer questions direct replication cannot—but only if the substitutions are honest. See what the proxy really proves.
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A Signal Isn’t a Strategy
A signal can look compelling and still fail as a strategy. See the rules, costs and sizing that turn an idea into a complete trading system.
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Backtests: Proving Ground, Not Sales Pitch
Backtests should be a Proving Ground, not a sales pitch. See the costs, benchmarks and failure modes a credible test must survive.
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Why a Standardized Backtesting Methodology Matters
Standardized backtesting methodology makes strategy comparisons meaningful. See which assumptions must stay fixed before you trust a result.
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How to Choose the Right Benchmark
Benchmark choice directly determines the question a backtest answers: opportunity set, control portfolio, active overlay and trade-offs.
