Cerus Corporation (CERS) P/E Ratio History
Historical price-to-earnings valuation from 2005 to 2005
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CERS Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
As of May 8, 2026, Cerus Corporation (CERS) trades at a price-to-earnings ratio of -31.8x, with a stock price of $2.61 and trailing twelve-month earnings per share of $-0.05.
The current P/E is 291% below its 5-year average of 16.6x. Over the past five years, CERS's P/E has ranged from a low of 13.4x to a high of 18.3x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Healthcare sector median P/E of 22.3x, CERS trades at a 243% discount to its sector peers. The sector includes 241 companies with P/E ratios ranging from 0.0x to 177.5x.
Relative to the broader market, CERS trades at a notable discount to the S&P 500 median P/E of 25.1x. 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 CERS 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.
CERS P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $3B | 26.5 | 4.61 | -38% | |
| $55B | 101.8 | - | +5% | |
| $161B | 57.6 | 2.65 | +23% | |
| $12B | 21.7Lowest | 0.70Best | +423%Best | |
| $4B | 29.3 | - | +5% |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
CERS Historical P/E Data (2005–2005)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2005 Q4 | Sat Dec 31 2005 00:00:00 GM | $10.15 | $0.56 | 18.3x | +10% |
| FY2005 Q3 | Fri Sep 30 2005 00:00:00 GM | $8.86 | $0.49 | 18.2x | +10% |
| FY2005 Q2 | $4.43 | $0.33 | 13.4x | -19% |
Average P/E for displayed period: 16.6x
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Start ComparisonCERS — Frequently Asked Questions
Quick answers to the most common questions about buying CERS stock.
Is CERS stock overvalued or undervalued?
CERS trades at -31.8x P/E, below its 5-year average of 16.6x. At the N/A percentile of historical range, the stock is priced at a discount to its own history.
How does CERS's valuation compare to peers?
Cerus Corporation P/E of -31.8x compares to sector median of 22.3x. The discount suggests lower growth expectations or higher risk.
What is CERS's PEG ratio?
CERS PEG ratio is N/A. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 2005-2005.