BOSTON (TheStreet) -- Checking in on the "Biotech Bubble: Yeah or Nay?" debate:
Momentum-driven biotech stocks -- mostly small- and mid-cap -- have been hit with some serious selling over the past month. These were some of the sector's highest flyers, but not lately. I'm talking about stocks like:Celldex Therapeutics (CLDX) : CLDX data by YCharts
Clovis Oncology (CLVS): ^NBI data by YCharts
and Immunomedics (IMMU): IMMU data by YCharts
2013 is shaping up to be a record year for biotech IPOs, but not all of the stellar debuts have staying power. Bluebird Bio (BLUE): BLUE data by YCharts
Alcobra Pharma (ADHD): ADHD data by YCharts
Onconova Therapeutics (ONTX): ONTX data by YCharts
Stemline Therapeutics (STML): STML data by YCharts
Some biotech IPOs keep moving higher, like... Receptos (RCPT) RCPT data by YCharts
and Ambit BioSciences (AMBI): AMBI data by YCharts
Big-cap biotech stocks are still performing strongly. Is there an investor flight to quality companies like Gilead Sciences (GILD), Amgen (AMGN), Biogen Idec (BIIB) and Celgene (CELG)? GILD data by YCharts
It's definitely NOT been a hard-knock life for orphan drug stocks in 2013: AEGR data by YCharts
But investors have sent orphans begging in the past month: AEGR data by YCharts
-- Reported by Adam Feuerstein in Boston. Follow @AdamFeuerstein
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