Short answer
Biotech rises on positive trial results, M&A deals from big pharma, or falling interest rates (which help early-stage companies).
Why are biotech stocks rising?
What happened
The SPDR Biotech ETF (XBI) rallied after a series of successful trial readouts.
Why it happened
Big pharma is running out of patent-protected drugs and is acquiring biotech companies aggressively. Falling rates make future drug revenue worth more today.
Why investors care
Biotech offers explosive upside — but individual names can drop 80% overnight on a failed trial.
How it affects ordinary people
New treatments for cancer, Alzheimer's and obesity.
FAQ
Is biotech risky?
Very — single-drug companies live and die on trial results.
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