USA Network is the most valuable part of NBC Universal at $11.7 billion, but the NBC network is worth a negative $600 million, according to Wunderlich Securities analyst Matthew Harrigan.
via THR.com.
Here's a roundup of the valuations given in that THR.com article, click through for the entire article:
NBC Network : -$600 million
USA Network: $11.7 billion
Universal Studios: $4 billion
Broadcast division as a whole (including NBC, Telemundo and local stations): $3.5 billion
Syfy: $6.3 billion
CNBC: $3.9 billion
MSNBC: $2.9 billion
Bravo: $2.6 billion
