How It Works

Beta is calculated by comparing a stock's past returns to those of a benchmark index — typically the S&P 500 — over a set period, usually three to five years. The formula in plain terms: Beta = how much the stock moves / how much the market moves, derived from a statistical technique called linear regression.

Tesla (TSLA) is a textbook high-beta stock. With a beta that has historically hovered around 2.0, the implication is that when the S&P 500 rises 10%, TSLA has tended to rise roughly 20% — and when the market drops 10%, TSLA has tended to fall around 20%. That amplification works in both directions.

A few reference points to anchor the concept:

  • Beta > 1: the stock is historically more volatile than the market (e.g., growth stocks, EV makers, semiconductors)
  • Beta = 1: moves roughly in line with the market
  • Beta < 1: historically less volatile than the market (e.g., utilities, consumer staples)
  • Negative beta: moves in the opposite direction to the market (rare; gold miners sometimes show this)

How to Read It

A high beta tells analysts that a stock has historically amplified market moves — both gains and losses. A low beta suggests the stock has been more insulated from broad market swings, which is why defensive sectors like utilities tend to cluster below 1.0.

Beta is a relative measure, not an absolute one. It describes how a stock has behaved compared to the market, not how risky the underlying business is in isolation. Sector context matters: a beta of 1.4 is fairly typical for technology stocks but would be considered elevated for a regulated utility.

Where to Find It on Quantify

Beta is displayed directly on each stock's overview page on Quantify, alongside other key statistics. You can see Tesla's current beta and compare it to sector peers on the TSLA stock page. It's a quick way to get a sense of how volatile a stock has historically been before digging deeper into the fundamentals.

Common Mistakes

Mistaking beta for total risk. Beta only captures market-related (systematic) risk — the part that moves with the broader economy. It ignores company-specific risks like a product recall, a CEO departure, or a regulatory fine. A stock can have a low beta and still carry enormous individual risk.

Treating beta as a fixed number. Beta is calculated from historical data, and it shifts over time. Tesla's beta in 2020 looked different from its beta in 2018. A company that was once a stable, slow-growing business can become high-beta after a strategic pivot — and vice versa. Always check what time window was used to calculate the beta figure you're looking at.