Changes to Regulation SHO Threshold Security List (Trade Date -02-21-07)

Additions:
AAACW
AENS
BCTE
CHDSF
CHIP
GMXP
JSXG
LOCM
NGLS
NTRI
OPTR
OVTI
QQQQ
XCHC
Subtractions:
ACTC
AGSI
AOPIF
CSCA
DNAG
ECMV
EVCC
GLLC
IOTN
NBEMF
NURO
NVNBF
PMSEY
SMTK
TVIA