Thursday's Analyst Upgrades and Downgrades

Double Hull Tankers(DHT Quote) is upgraded to a buy rating from neutral at UBS. However, UBS' price target for Double Hull dips to $15.00 from $15.75.

Nalco(NLC Quote) is upgraded to a buy rating from hold at Jefferies. The price target and fiscal 2008 EPS estimates hold at $27 and $1.30, respectively.

Goldman reinstates its rating on Transocean(RIG Quote). Goldman said it is removing the "not rated" designation from RIG and now rates shares as neutral. Goldman sees strong deepwater exposure and growth profile but cited concerns over valuation and increased jackup exposure (30% of EBITDA now vs. 15% pre-merger). Goldman keeps its price target for Transocean at $157.

Range Resources(FBR Quote) is upgraded to an outperform rating at FBR, which said positive news flow is expected before year-end. Target price is $48.

American International Group's(AIG Quote) numbers are lowered at UBS. Its price target drops to $61 from $75, and fiscal 2008 earnings-per-share estimates dip to $6.19 from $6.44. UBS reiterates its neutral rating.

Goldman said it is trimming its target on Boeing(BA Quote) to $98 from $103 on the basis of a lower relative price/earnigns multiple in its valuation model. Goldman says it believes Boeing's current share price anticipates fewer than 85 deliveries by the end of 2009. It maintained its neutral rating.

Deutsche Bank said it is cutting its target price on Dollar Tree Stores(DLTR Quote) from $41 to $30 as comps have decelerated.