How to Chart Historical P/E Ratios for Any Stock (Free)

Why Most P/E Charts Are Misleading

Go look up a P/E ratio chart for Apple or Tesla on most finance sites. What you'll see is a series of staircase steps: the P/E jumps once per quarter when new earnings are reported, then stays flat until the next earnings release.

That's technically accurate but practically useless. Stock prices move every day. A company's P/E ratio changes every day too, because the "P" in P/E is the price. But most tools only update the ratio when new earnings data arrives quarterly.

The result is a choppy chart that hides the valuation story happening between earnings reports. If you're trying to understand whether a stock is getting cheaper or more expensive over time, you need daily granularity.

How Daily P/E Actually Works

The math is simple: Daily P/E = Today's closing price / Trailing twelve-month (TTM) earnings per share.

TTM EPS is the sum of the last four quarters of earnings. When a new quarter reports, the oldest quarter drops off and the new one replaces it. Between earnings reports, TTM EPS stays constant while the stock price moves around.

This means the daily P/E is really tracking price movement relative to the most recent known earnings. When the stock price rises 10% between earnings reports, the P/E rises 10% too. That's valuable information that quarterly-only charts completely hide.

What You Can See With Daily P/E

A daily P/E chart reveals patterns that quarterly snapshots miss:

Valuation compression. A stock can rise 20% over a year while its P/E actually drops, because earnings grew faster than the price. This is what happened with many tech stocks in 2023-2024. On a quarterly chart, the drop looks sudden. On a daily chart, you can see the gradual compression in real time. Panic vs. fundamentals. During a selloff, daily P/E shows you exactly how cheap a stock is getting relative to its earnings. In March 2020, daily P/E charts showed stocks hitting multi-year valuation lows within days, not weeks. Pre-earnings drift. In the weeks before earnings, prices often drift based on expectations. Daily P/E captures this drift precisely, showing you whether the market is pricing in a beat or a miss.

Comparing Valuations Across Stocks

Single-stock P/E is useful. But the real power is peer comparison.

Is Nvidia expensive at 35x earnings? Compared to what? If AMD trades at 45x and the semiconductor sector averages 25x, that context changes your interpretation.

StockResearch lets you overlay P/E ratios for multiple companies on the same chart. Pick any two tickers, switch to the Multiples tab, and see their valuation histories side by side. The chart handles everything: different fiscal year ends, different reporting schedules, different currencies.

How StockResearch Computes This

When you select a ticker and open the Multiples tab:

1. We pull daily closing prices going back up to 5 years 2. We pull quarterly financial statements (income statement, balance sheet, cash flow) 3. We compute trailing twelve-month figures for each fundamental metric 4. We divide each day's closing price by the corresponding TTM metric

This gives you smooth, daily-resolution valuation multiples, not the stepped quarterly charts you see elsewhere.

We support P/E, P/S, P/B, EV/Revenue, and EV/EBITDA. If a company has negative earnings (making P/E meaningless), we automatically suggest P/S or EV/Revenue instead.

Try It

Pick any stock and check its valuation history:

Open the Multiples Tab on StockResearch

Compare two companies to see how their valuations have diverged or converged over time. You might be surprised by what the daily view reveals.

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This post is for informational purposes only and does not constitute financial advice. Valuation multiples are one input among many in investment analysis. Past valuation levels do not predict future returns.