MRSN
Mersana Therapeutics, Inc. Healthcare - Biotechnology Investor Relations →
Mersana Therapeutics, Inc. (MRSN) closed at $29.08 as of 2026-01-05, trading 60.8% below its 200-week moving average of $74.26. This places MRSN in the extreme value zone. The stock moved further from the line this week, up from -61.1% last week. With a 14-week RSI of 92, MRSN is in overbought territory.
Over the past 397 weeks of data, MRSN has crossed below its 200-week moving average 5 times. On average, these episodes lasted 65 weeks. The average one-year return after crossing below was -59.0%, suggesting these dips have not historically been reliable buying opportunities for this stock.
With a market cap of $145 million, MRSN is a small-cap stock. Free cash flow yield is currently negative, meaning the company is burning cash.
Share count has increased 56.9% over three years, indicating dilution.
Over the past 7.7 years, a hypothetical investment of $100 in MRSN would have grown to $6, compared to $288 for the S&P 500. MRSN has returned -30.0% annualized vs 14.8% for the index, underperforming the broader market over this period.
Free cash flow has been volatile over the past several years, making the quality of earnings harder to assess.
Growth of $100: MRSN vs S&P 500
Monthly data normalized to $100 at start. Vertical dashed lines mark 200-week MA touches.
What Happens After MRSN Crosses Below the Line?
Across 5 historical episodes, buying MRSN when it crossed below its 200-week moving average produced an average return of -55.4% after 12 months (median -54.0%), compared to -2.8% for the S&P 500 over the same periods. After 24 months, the average return was -34.0% vs +10.6% for the index.
Each line shows $100 invested at the moment MRSN crossed below its 200-week MA. Bold blue = stock average. Gray dashed = S&P 500 average over same periods.
Historical Touches
MRSN has crossed below its 200-week MA 5 times with an average 1-year return of +-59.0% after recovery.
| Crossed Below | Recovered | Weeks | Max Depth | 1-Year Return | Return Since Touch |
|---|---|---|---|---|---|
| Jun 2018 | Jun 2018 | 1 | 10.6% | -70.6% | -92.1% |
| Jul 2018 | May 2020 | 95 | 86.1% | -75.6% | -92.9% |
| Jul 2021 | Aug 2021 | 2 | 9.8% | -54.2% | -90.2% |
| Aug 2021 | Aug 2021 | 1 | 3.7% | -35.8% | -90.0% |
| Sep 2021 | Ongoing | 227+ | 93.4% | Ongoing | -86.4% |
| Average | 65 | — | +-59.0% | — |
Not financial advice. This is an educational tool. Past performance does not guarantee future results. Do your own research before making investment decisions.
Data as of Friday close, 2026-01-05