Aldeyra The (ALDX) P/E Ratio History
Deep ValueTrading at 0.0x · of 5-year range · Significant discount to historical valuation · Data 2014–2014
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P/E Ratio Analysis
As of November 9, 2026, Aldeyra The (ALDX) trades at a price-to-earnings ratio of 0.0x, with a stock price of $0.63 and trailing twelve-month earnings per share of $-62350.53.
The current P/E is 100% below its 5-year average of 1.7x. Over the past five years, ALDX's P/E has ranged from a low of 1.7x to a high of 1.7x, placing the current valuation at the nullth percentile of its historical range.
Compared to the Healthcare sector median P/E of 24.6x, ALDX trades at a 100% discount to its sector peers. The sector includes 242 companies with P/E ratios ranging from 0.0x to 196.0x.
Relative to the broader market, ALDX trades at a notable discount to the S&P 500 median P/E of 21.8x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our ALDX DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
ALDX Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
ALDX P/E vs Peers
Front-of-Eye Drugs peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $12B | 26.2 | 1.14 | -25% | |
| $1B | 7.1Lowest | 0.69Best | +817%Best |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
ALDX Historical P/E Data (2014–2014)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2014 Q2 | Jun 30 2014 | $6.56 | $3.94 | 1.7x | +0% |
Average P/E for displayed period: 1.7x
ALDX Chart Terminal
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Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
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Peer Comparison
Compare growth, multiples, and margins vs sector.
ALDX — Frequently Asked Questions
Quick answers to the most common questions about buying ALDX stock.
What is ALDX's P/E ratio?
Aldeyra The (ALDX) trailing twelve-month P/E ratio is 0.0x, based on TTM diluted EPS of $-62350.53. The 5-year average P/E is 1.7x and the historical range spans 1.7x to 1.7x.
Is ALDX stock overvalued or undervalued?
ALDX current P/E: 0.0x. 5-year average P/E: 1.7x. Percentile: N/A.
Is ALDX stock expensive?
ALDX is fairly valued relative to its own history. The current P/E of 0.0x is near the 5-year average of 1.7x (N/A percentile of historical range).
What is ALDX's historical P/E range?
Over the past 5 years, ALDX's P/E ratio has ranged from 1.7x to 1.7x, with a median of 1.7x and an average of 1.7x. The current P/E of 0.0x places the stock at the N/A percentile of this range. Full historical data spans 2014–2014.
How does ALDX's P/E compare to the S&P 500?
ALDX current P/E: 0.0x. S&P 500 median P/E: 21.8x.
How does ALDX's valuation compare to Healthcare peers?
Aldeyra The P/E of 0.0x can be benchmarked against Healthcare peers in the comparison table on this page.
What is ALDX's PEG ratio?
ALDX PEG ratio is N/A, based on a P/E of 0.0x and EPS growth of 40.4%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is ALDX's earnings yield?
ALDX earnings yield is N/A, the inverse of its 0.0x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.