Changes to Regulation SHO Threshold Security List (Trade Date - 04-17-07)

Additions:
AURRF
BLEFF
CPSL
GORO
GSAT
GXMLF
IPII
MNRUF
MTRAF
PCYC
VAPH
Subtractions:
ABSY
ACAD
ACMG
CLRC
CTIB
FMRX
INSM
IVOT
LBTS
PPCO
PPXP
SIMC
UFEN
VEXP
ZROS