Amazon.com

(AMZN) - Get Report

was downgraded to sell from hold by Mark Rowen at

Prudential Securities

.

Rowen also slashed the company's price target to $9 from $20.

The note said: "The anemic growth in Amazon's most mature -- and only profitable -- segment has caused us to re-examine Amazon's market valuation." The firm added that Amazon's market cap is overextended, which poses further downside risk to investors.

Upgrades

UnitedHealth Group

(UNH) - Get Report

: ADDED to Focus One list at

Merrill Lynch

.

Downgrades

Corixa

(CRXA)

: DOWN to hold from strong buy at Prudential.

Credence Systems

(CMOS)

: 2001 EPS view DOWN to 38 cents from $1 at

Goldman Sachs

; and 2002 EPS view DOWN to $1.76 from $2.35.

Dow Chemical

(DOW) - Get Report

: 2001 EPS view DOWN to $1.40 from $1.85 at Goldman.

Fundtech

(FNDT)

: price target DOWN to $19 from $33 at

Lehman Brothers

; and 2001 operating EPS DOWN to 60 cents, excluding goodwill amortization of 16 cents a share, from $1.13.

Ilex Oncology

(ILXO)

: price target DOWN to $45 from $63 at Prudential.

IPC Holdings

(IPCR)

: DOWN to outperform from strong buy at

Morgan Stanley

.

JDS Uniphase

(JDSU)

: 2001 EPS view DOWN to 73 cents from 81 cents a share at Merrill; and 2002 EPS view DOWN to 88 cents from $1.02.

Nice Systems

(NICE) - Get Report

: price target DOWN to $18 from $30 at

UBS Warburg

.

Powerwave Technologies

(PWAV)

: DOWN to outperform from strong buy at Morgan Stanley.

Sunoco

(SUN) - Get Report

: DOWN to hold from accumulate at Prudential.

TD Waterhouse

(TWE)

: 2001 EPS view DOWN to 60 cents from 71 cents a share at

Credit Suisse First Boston

.

Ultramar Diamond

(UDS)

: DOWN to hold from accumulate at Prudential.

VoiceStream Wireless

(VSTR)

: DOWN to neutral from outperform at

Salomon Smith Barney

; and price target DOWN to $115 from $140.

Wireless Facilities

(WFII)

: DOWN to long-term buy from buy at

J.P. Morgan

.

Initiations

Interwoven

(IWOV)

: NEW strong buy at Prudential; price target: $32.

Valassis Communications

(VCI)

: NEW buy at CSFB.

Vectren

(VVC)

: NEW buy at CSFB.

Group Moves

Lehman started coverage of Internet security stocks:

  • Internet Security (ISSX) : NEW strong buy; price target: $80.
  • RSA Security (RSAS) : NEW buy; price target: $65.
  • Entrust Technologies (ENTU) : NEW market performer.
  • Symantec (SYMC) - Get Report: NEW market performer.