Ticker Talk

Among Tuesday’s new stock ratings issued by Wall Street analysts:

* Aspen Technology Inc. (AZPN; close and change: $27.38, up $1.50) was rated new “buy” by Jefferies & Co., with a $37 target.

* Diversinet Corp. (DVNT; $22.88, up $4.25) was rated new “strong buy” by Tucker Cleary Capital Markets.

* EBay Inc. (EBAY; $139.88, up $5.88) was raised to “buy” from “neutral” by Sands Bros., with a $175 target.

* Entrust Technologies Inc. (ENTU; $60.75, up $10.88) was rated new “buy” by Davenport & Co., with a $75-$80 target.

* Family Dollar Stores (FDO; $15.31, up 6 cents) was rated “buy” in new coverage by Dain Rauscher, with a $20 target.

* Gene Logic Inc. (GLGC; $22.75, down $5.38) was downgraded to “neutral” from “buy” by SG Cowen.

* Global Imaging Systems Inc. (GISX; $10.38, down $1) was downgraded to “hold” from “strong buy” by First Union Securities.

* Northern Trust Corp. (NTRS; $51.69, down $1.38) was downgraded to “market perform” from “buy” by Advest.