The following ratings changes were generated on Thursday, Oct. 23.

We've downgraded

Cisco Systems

, designs, manufactures andsells IP-based networking products, from buy to hold. Strengths include its revenue growth, largely solid financial position with reasonable debt levels by most measures and growth in earnings per share. However, the stock has had a generally disappointing performance in the past year.

Revenue growth of 9.9% since the same quarter one year ago greatly exceeded the industry average of 27.7%, improving EPS. Cisco's 0.20 debt-to-equity ratio is very low but is nonetheless higher than the industry average. Its quick ratio of 2.23 demonstrates an ability to cover short-term liquidity needs. Return on equity has improved slightly over the same quarter last year, outperforming the

S&P 500

but underperforming the communications equipment industry. Gross profit margin of 67% is rather high but has decreased since the same period last year. Net profit margin of 19.4% compares favorably to the industry average.

Shares have plunged by 44.51% on the year. Naturally, the overall market trend is bound to be a significant factor, and the stock's sharp decline last year could be a positive for future investors, making it cheaper (in proportion to its earnings over the past year) than most other stocks in its industry. However, we feel the stock is still not a good buy right now.

We've downgraded science and technology company

DuPont

(DD) - Get Report

from buy to hold. Strengths include its revenue growth, reasonable valuation levels and largely solid financial position with reasonable debt levels by most measures. Weaknesses include deteriorating net income, poor profit margins and weak operating cash flow.

Since the same quarter one year prior, revenues slightly increased by 5.2%, underperforming the industry average of 14%. DuPont's debt-to-equity ratio of 0.82 is somewhat low overall is high when compared to the industry average, implying that the management of the debt levels should be evaluated further. The company's quick ratio of 1.02 is sturdy. Net operating cash flow has decreased to $927.00 million, or 11.12% when compared with the same quarter last year. Net income has decreased by 30.2% since the same quarter a year ago, significantly underperforming the chemicals industry average but outperforming the S&P 500.

We've downgraded pharmaceutical company

GlaxoSmithKline

(GSK) - Get Report

from buy to hold. Strengths include its notable return on equity and expanding profit margins. Weaknesses include deteriorating net income, generally poor debt management and weak operating cash flow.

Current return on equity exceeded that from the same quarter one year prior as well as both the pharmaceutical industry average and the S&P 500, a clear sign of strength within the company. The gross profit margin is currently very high, coming in at 74.70%, but is a decrease from the same period last year. Net profit margin of 15.90% trails the industry average.The revenue fell by 30.8%, significantly faster than the industry average of 11.7%.

Net income fell 53.6% when compared with the same quarter a year go, from $2,763.77 million to $1,283.42 million. Shares have plunged 27.87% over the past year, and EPS have sunk 48.48% compared with the year-earlier quarter. The stock's sharp decline last year could a positive for future investors, making it cheaper (in proportion to its earnings over the past year) than most other stocks in itsIndustry, but we feel the stock is still not a good buy right now.

We've downgraded toy company

Mattel

(MAT) - Get Report

from buy to hold. Strengths include its revenue growth, largely solid financial position with reasonable debt levels by most measures and increase in net income. However, as a counter to these strengths, we also findweaknesses including weak operating cash flow and disappointing return on equity.

Revenue growth of 4.8% since the same quarter last year has slightly outpaced the industry average of 2.1%. The current debt-to-equity ratio, 0.59, is low and is below the industry average, implying that there has been successful management of debt levels. The company also maintains an adequate quick ratio of 1.11, which illustrates the ability to avoid short-term cash problems.EPS have risen by 8.2% in the most recent quarter compared with the same quarter a year ago. The company has demonstrated a pattern of positive earnings per share growth over thepast two years, but we anticipate underperformance relative to this pattern in the coming year. During the past fiscal year, Mattel increased its bottom line by earning $1.59 vs. $1.55 in the prior year, but for the next year, the market is expecting a contraction of 15.1% in earnings to $1.35.

The company's current return on equity has slightly decreased from the same quarter one year prior, undeperfoming the leisure equipment and products industry but outperforming the S&P 500. This implies a minor weakness in the organization. Net operating cash flow has decreased to -$137.32 million, or 14.98% when compared with the same quarter last year. In addition, when comparing to the industry average, the firm's growth rate is much lower.

We've downgraded

Polo Ralph Lauren

(RL) - Get Report

, which engages in the design, marketing, and distribution of lifestyle products, from buy to hold. Strengths include its growth in earnings per share, increase in net income and revenue growth. Weaknesses include a decline in the stock price during the past year and disappointing return on equity.

EPS have risen by 13.4% in the most recent quarter compared with the same quarter a year ago. The company has demonstrated a pattern of positive earnings per share growth over the past two years that we feel should continue. This trend suggests that the performance of the business is improving. During the past fiscal year, Polo Ralph Lauren increased its bottom line by earning $3.99 vs. $3.73 in the prior year. This year, the market expects an improvement in earnings to $4.09. The net income increased by 7.8% when compared to the same quarter one year prior, from $88.30 million to $95.20 million, outperforming the S&P 500 and the textiles, apparel and luxury goods industry average.

Return on equity has slightly decreased from the same quarter one year ago, underperforming the industry average but outperforming the S&P 500. The gross profit margin is rather high; currently it is at 57.30%, having increased from the same quarter the previous year, but the net profit margin of 8.50% trails the industry average. Shares plunged by 35.54% over the year. This decline should not necessarily be interpreted as a negative; it could be one of the factors that may help make the stock attractive down the road. Right now, however, we believe that it is too soon to buy.

Other ratings changes include

Ingersoll-Rand

(IR) - Get Report

and

Jones Apparel Group

(JNY)

, both downgraded from hold to sell.

All ratings changes generated on Oct. 23 are listed below.

Ticker

Company

Current

Change

Previous

ADP

Automatic Data Processing

HOLD

Downgrade

BUY

AFG

American Financial Group

HOLD

Downgrade

BUY

AIRT

Air T

HOLD

Downgrade

BUY

AIZ

Assurant

HOLD

Downgrade

BUY

ALC

Assisted Living Concepts

SELL

Downgrade

HOLD

ANCX

Access National

HOLD

Upgrade

SELL

ATW

Atwood Oceanics

HOLD

Downgrade

BUY

AXS

Axis Capital

HOLD

Downgrade

BUY

BIDZ

Bidz.com

SELL

Downgrade

HOLD

BLKB

Blackbaud

HOLD

Downgrade

BUY

BPOP

Popular

SELL

Downgrade

HOLD

CBE

Cooper Industries

HOLD

Downgrade

BUY

CLR

Continental Resources

SELL

Downgrade

HOLD

CNX

Consol Energy

HOLD

Downgrade

BUY

COCO

Corinthian Colleges

HOLD

Downgrade

BUY

CRZO

Carrizo Oil & Gas

SELL

Downgrade

HOLD

CSCO

Cisco Systems

HOLD

Downgrade

BUY

CSGP

Costar Group

HOLD

Downgrade

BUY

DD

DuPont

HOLD

Downgrade

BUY

DRC

Dresser-Rand

HOLD

Downgrade

BUY

DVR

Cal Dive

SELL

Downgrade

HOLD

EMN

Eastman Chemical

HOLD

Downgrade

BUY

ESV

Ensco

HOLD

Downgrade

BUY

EYE

Advanced Medical Optics

SELL

Downgrade

HOLD

FOSL

Fossil

HOLD

Downgrade

BUY

FPFC

First Place Financial

SELL

Downgrade

HOLD

GGB

Gerdau

HOLD

Downgrade

BUY

GIFI

Gulf Island Fabrication

HOLD

Downgrade

BUY

GSK

GlaxoSmithKline

HOLD

Downgrade

BUY

HMNF

HMN Financial

SELL

Downgrade

HOLD

IR

Ingersoll-Rand

SELL

Downgrade

HOLD

IXYS

IXYS

HOLD

Downgrade

BUY

JBX

Jack in the Box

HOLD

Downgrade

BUY

JNY

Jones Apparel Group

SELL

Downgrade

HOLD

KTC

KT

SELL

Downgrade

HOLD

MAT

Mattel

HOLD

Downgrade

BUY

MCK

McKesson

HOLD

Downgrade

BUY

MIDD

Middleby

HOLD

Downgrade

BUY

MIL

Millipore

HOLD

Downgrade

BUY

MTOX

Medtox Scientific

HOLD

Downgrade

BUY

MTRX

Matrix Service

HOLD

Downgrade

BUY

MWA

Mueller Water Products

SELL

Downgrade

HOLD

NTRS

Northern Trust

HOLD

Downgrade

BUY

PEET

Peet's Coffee & Tea

HOLD

Downgrade

BUY

PH

Parker-Hannifin

HOLD

Downgrade

BUY

PII

Polaris Industries

HOLD

Downgrade

BUY

POM

Pepco Holdings

HOLD

HOLD

BUY

PQ

Petroquest Energy

HOLD

Downgrade

BUY

PRAA

Portfolio Recovery

HOLD

Downgrade

BUY

PWRD

Perfect World

SELL

Downgrade

HOLD

RFIL

RF Industries

HOLD

Downgrade

BUY

RICK

Rick's Caberet

HOLD

Downgrade

BUY

RL

Polo Ralph Lauren

HOLD

Downgrade

BUY

RSTI

Rofin Sinar

HOLD

Downgrade

BUY

RYN

Rayonier

HOLD

Downgrade

BUY

SAP

SAP

HOLD

Downgrade

BUY

SRE

Sempra Energy

HOLD

Downgrade

BUY

TER

Teradyne

SELL

Downgrade

HOLD

TNE

Tele Norte Leste

HOLD

Downgrade

BUY

UNM

Unum Group

HOLD

Downgrade

BUY

VIST

VIST Financial

SELL

Downgrade

HOLD

VR

Validus

SELL

Downgrade

HOLD

VSEA

Varian Semiconductor

HOLD

Downgrade

BUY

VVC

Vectren

HOLD

Downgrade

BUY

WINN

Winn-Dixie Stores

SELL

Downgrade

HOLD

WLFC

Willis Lease Finance

HOLD

Downgrade

BUY

WOOF

VCA Antech

HOLD

Downgrade

BUY

WTS

Watts Water Technologies

HOLD

Downgrade

BUY

Each business day, TheStreet.com Ratings updates its ratings on the stocks it covers. The proprietary ratings model projects a stock's total return potential over a 12-month period, including both price appreciation and dividends. Buy, hold or sell ratings designate how the Ratings group expects these stocks to perform against a general benchmark of the equities market and interest rates. While the ratings model is quantitative, it uses both subjective and objective elements. For instance, subjective elements include expected equities market returns, future interest rates, implied industry outlook and company earnings forecasts. Objective elements include volatility of past operating revenue, financial strength and company cash flows. However, the rating does not incorporate all of the factors that can alter a stock's performance. For example, it doesn't always factor in recent corporate or industry events that could affect the stock price, nor does it include recent technology developments and competitive dynamics that may affect the company. For those reasons, we believe a rating alone cannot tell the whole story, and that it should be part of an investor's overall research.

This article was written by a staff member of TheStreet.com Ratings.