- Hopes of Chinese stimulus drive gains- DBRS downgrades Spain and Italy- Randgold rises after results, StanChart continues to reboundThe FTSE 100 edged slightly higher on Thursday morning, maintaining a four-month high, as investors reflected on downgrades in the Eurozone and inflation data from China.DBRS has decided to cut Spain's rating two notches to 'A (low)' and downgraded Italy by one notch to 'A', although it kept its negative outlook on both countries. The Canadian credit ratings agency is one of the four used by the European Central Bank (ECB) to determine the charges when accepting sovereign debt as collateral.Chinese consumer price inflation slowed to 1.8% in July from a 2.2% increase in June, according to the National Bureau of Statistics in Beijing. While this was broadly in line with expectations, analysts are saying this morning that this has left the door open to more monetary easing in the world's second-largest economy. "The Chinese government have already stated that they will not wait for conditions to worsen before acting. We have already seen examples of this, with a number of measures taken recently including two rate cuts in a month," said Craig Erlam from Alpari.FTSE 100: Randgold shining early on; AMEC dropsGold miner Randgold Resources saw profits surge in the first half of 2012 on the back of a record performance from its flagship Loulo-Gounkoto complex in Mali. Shares jumped in the opening hour.Heading the other way was engineering and consultancy group AMEC despite saying it is on track for double-digit underlying revenue growth this year as sales jumped by over a third in the first half. THe firm did not that its EBITDA margin slipped in the first half, and while it is expected to improve in the second half, it will be lower than the previous year.Struggling insurance giant Aviva edged higher despite reporting a 10% fall in half-year operating profits as foreign exchange fluctuations and restructuring costs hit the bottom line.Meanwhile, banking group Standard Chartered was a high riser as it continues to rebound from its 16% drop on Tuesday on the back of alleged dealings with the Iranian government.FTSE 250: Ocado drops after downgradeShares in online grocery group Ocado took a hit this morning after UBS downgraded the stock from 'neutral' to 'sell', saying that consensus estimates are too bullish for next year and there is evidence of demand growth slowing.Heavy rain has hit Bumi's output this year, causing shares to slip this morning. Nevertheless, an improved performance in the second quarter should continue into the second half (weather permitting), ensuring most of the miner's production shortfall is made good.Package tour operator TUI Travel fell after saying that currency headwinds held by revenue growth in the three months to the end of June.FTSE 100 - RisersStandard Chartered (STAN) 1,363.00p +3.61%Randgold Resources Ltd. (RRS) 6,360.00p +2.75%ITV (ITV) 83.25p +2.46%Aggreko (AGK) 2,257.00p +1.39%Evraz (EVR) 283.80p +1.36%Tullow Oil (TLW) 1,376.00p +1.18%Glencore International (GLEN) 341.90p +1.18%Weir Group (WEIR) 1,744.00p +1.16%Imperial Tobacco Group (IMT) 2,520.00p +1.08%British Sky Broadcasting Group (BSY) 750.00p +0.94%FTSE 100 - FallersAmec (AMEC) 1,088.00p -6.13%BT Group (BT.A) 216.80p -2.21%Rio Tinto (RIO) 3,190.50p -0.92%Vodafone Group (VOD) 189.65p -0.84%Capita (CPI) 733.50p -0.74%Smiths Group (SMIN) 1,067.00p -0.74%Royal Bank of Scotland Group (RBS) 227.20p -0.74%National Grid (NG.) 685.50p -0.72%Prudential (PRU) 799.00p -0.68%SSE (SSE) 1,320.00p -0.68%FTSE 250 - RisersPerform Group (PER) 378.80p +3.02%Grainger (GRI) 95.10p +2.26%Imagination Technologies Group (IMG) 538.00p +1.99%Jardine Lloyd Thompson Group (JLT) 777.50p +1.63%Senior (SNR) 201.80p +1.56%Hochschild Mining (HOC) 442.60p +1.54%Dunelm Group (DNLM) 588.00p +1.47%KCOM Group (KCOM) 78.45p +1.42%Domino Printing Sciences (DNO) 589.00p +1.38%St James's Place (STJ) 368.80p +1.32%FTSE 250 - FallersOcado Group (OCDO) 72.00p -5.26%Bumi (BUMI) 356.10p -3.76%Kier Group (KIE) 1,252.00p -2.87%NMC Health (NMC) 193.40p -2.81%Aquarius Platinum Ltd. (AQP) 35.32p -2.51%Man Group (EMG) 83.75p -1.59%Rathbone Brothers (RAT) 1,271.00p -1.47%Dialight (DIA) 1,079.00p -1.46%TR Property Inv Trust (TRY) 161.60p -1.46%Carpetright (CPR) 595.50p -1.33%BC