NEW YORK (CNN/Money) - Merrill Lynch slashed its investment rating on Dow component Johnson & Johnson ahead of the opening bell Friday, while Credit Suisse First Boston raised its price objective on another Dow 30 member, Walt Disney.

Merrill Lynch cut Johnson & Johnson (JNJ: Research, Estimates) to "neutral" from "buy." Shares of the healthcare and consumer goods company rose 72 cents to $51.79 Thursday.

Merrill upgraded Archstone-Smith Trust (ASN: Research, Estimates) to "buy" from "neutral." The operator of apartment communities slipped 15 cents to $25.85 Thursday.

The firm also upgraded Beckman Coulter (BEC: Research, Estimates) to "buy" from "neutral." The biomedical company's shares rose 64 cents to $44.34 Thursday.

Credit Suisse First Boston raised its price target on Dow component Disney (DIS: Research, Estimates) to $31 from $27 after the company reported better-than-expected fiscal third-quarter earnings. Shares of the media and entertainment company rose 23 cents to $21.92 Thursday.

J.P. Morgan lowered its rating on Express Scripts (ESRX: Research, Estimates) to "neutral" from "overweight." The prescription management provider's shares fell $1.28 to $66 Thursday.

J.P. Morgan upgraded Symbol Technologies (SBL: Research, Estimates) to "overweight" from "neutral." Shares of the wireless networking systems maker rose 91 cents to $12.81.

The firm also downgraded Cardinal Health (CAH: Research, Estimates) to "neutral" from "overweight." The healthcare product maker fell $9.71 to $54.75 Thursday.

Lehman raised its investment rating on Sanmina-SCI (SANM: Research, Estimates) to "overweight" from "equal weight." The electronics manufacturer's stock rose 11 cents to $7.97 Friday.  

-- from staff and wire reports