Sector Relative Strength

Overview

This pillar measures a stock's performance against its direct industry peers and broader sector. It helps identify true market leaders that are outperforming, providing a strong signal for future price movements.

What It Does

It calculates a relative strength ratio by comparing a stock's price trend to the price trend of a relevant sector benchmark, like an ETF. A rising ratio indicates the stock is outperforming its sector, while a falling ratio signals underperformance. This analysis filters out broad market noise to isolate company-specific momentum.

Why It Matters

A stock rising with the market is common, but one rising faster than its peers is exceptional. This pillar provides a crucial edge by pinpointing these high-momentum assets, which often continue to lead, and flagging laggards that may continue to fall behind.

How It Works

First, a stock and its corresponding sector ETF are selected, for example, NVDA and the SMH semiconductor ETF. The pillar then calculates a price ratio by dividing the stock's price by the ETF's price over a set period. Finally, it analyzes the trend of this ratio, often using a moving average, to determine if the stock's relative strength is increasing or decreasing.

Methodology

The core calculation is the Relative Strength Ratio: RS Ratio = (Stock Price / Sector ETF Price). This ratio is typically plotted as a line chart and analyzed over 50, 100, and 200-day timeframes. A 20-day simple moving average (SMA) is often applied to the RS Ratio line to identify durable trends and filter out daily volatility.

Edge & Advantage

This pillar moves beyond simple price momentum to reveal which stocks are truly leading the pack, providing a clearer signal than looking at price charts alone.

Key Indicators

• Relative Strength Ratio Trend

  high

  The direction of the ratio's moving average, indicating sustained outperformance or underperformance.

• Ratio Breakout

  medium

  When the RS Ratio breaks above a key resistance level, signaling an acceleration in relative momentum.

• Peer Group Comparison

  medium

  Ranking the stock's RS Ratio against its top 5 closest competitors within the same industry.

Data Sources

• Yahoo Finance

  Provides free historical daily price data for individual stocks and sector ETFs.

• State Street SPDR ETFs

  Source for benchmark sector ETFs like XLK (Tech), XLF (Financials), and XLE (Energy).

• TradingView

  Charting platform with built-in tools to calculate and visualize relative strength ratios.

Example Questions This Pillar Answers

• → Will Apple (AAPL) outperform the Technology Select Sector SPDR Fund (XLK) in Q4?
• → Which of these bank stocks will have the highest relative strength versus the XLF by year-end?
• → Will Eli Lilly (LLY) maintain a positive relative strength trend against the Health Care ETF (XLV) for the next six months?

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