Methodology
Readable math. Explicit assumptions.
Tech Market Pulse intentionally favors explainable transformations over black-box scoring. Every headline metric can be traced back to daily closing-price data and a compact set of standard quantitative calculations.
Market universe
The dashboard tracks AAPL, MSFT, NVDA, AMZN, GOOGL, META, TSLA, QQQ, VGT, SMH, and ARKK. The fixed universe keeps comparisons consistent across mega-cap technology, semiconductors, broad technology ETFs, higher-beta names, and innovation exposure.
Returns
Periodic returns compare the latest close with the close approximately 5, 21, 63, 126, or 252 trading sessions earlier. YTD compares the latest close with the first available session of the current calendar year.
Realized volatility
Volatility is the sample standard deviation of daily log returns annualized by the square root of 252. It is descriptive realized volatility, not implied volatility and not a forecast.
Maximum drawdown
Maximum drawdown measures the worst peak-to-trough percentage decline observed in the sampled price series.
Relative strength
The dashboard compares each asset's one-month return with QQQ's one-month return. Positive values indicate recent outperformance versus the Nasdaq-100 ETF benchmark.
Correlation
Pairwise Pearson correlation is calculated from aligned daily log returns. Values near 1 indicate strong positive co-movement; values near 0 indicate weak linear co-movement; negative values indicate inverse movement.
Market Pulse score
The 0–100 pulse is a compact descriptive composite of one-month momentum, positive breadth, and realized volatility across the tracked universe. It is designed for fast market-structure orientation, not trading signals.