Yesterday's profit from Rio Tinto was a record and better than expected, but the shares aren't trading far from where they were at February's finals, too low for Charles Stanley.The miner made US$5.8bn in the six months to 30 June, up from £2.6bn in the same period last year on sales of $26.8bn compared with $19.5bn in 2009.But analyst Tom Gidley-Kitchin points out that expectations for 2010 revenues have risen 17% and earnings per share by 45% in the last six months, while the FTSE 100 isn't even 4% higher."So Rio, like the rest of the mining sector, has been de-rated a little," he says. "With global prospects probably a little better than in early 2010 - at worst, we are closer to the end of the crisis than we were - we think that provides a measure of support."Gidley-Kitchin keeps his "accumulate" stance, though points out that Charles Stanley's overall view of the sector is that it "may be better to wait for a quarter or more before adding to existing holdings".Consensus expectations for 2010, 2011 and 2012 are for revenues of $53.2bn, $58.1bn and $58.8bn and EBITDA of $25.4bn, $27.7bn and $28.3bn.PartyGaming's numbers reveal the online gaming firm is trading "relatively well" in KBC Peel Hunt's view, and well enough for it to repeat 'buy' advice Friday.The increase in revenue to €181m beat Peel Hunt's forecast of €179m, while the clean EBITDA figure of €48.1m topped expectations of €44.8m.Management is comfortable with consensus EBITDA of €102.6m for 2010, slightly above the broker's "conservative" €99.1m."The recent opening of the French market and delay to additional Italian legislation does not help short-term visibility but PartyGaming is well placed to benefit from a global market that is gradually opening up," it said.Peel Hunt has put the target price under review as the shares currently trade above the existing target of 286p.Panmure Gordon has upped its forecasts and target price on Trinity Mirror, calling the newspaper group "an annuity with bells on". The broker raised the target price to 175p from £140p and reiterated its 'buy' rating.It also increased its earnings per share forecasts for the second time in a week, this time by 4% for the full year 2010/11."In our opinion the shares are very undervalued," the broker said.