UK markets pulled back from a four-week high on Thursday as investors gave a mixed reaction to an 11th-hour deal on Capitol Hill to increase the debt ceiling and reopen the US government.Nevertheless, losses were trimmed by midday after UK retail sales rose by a better-than-expected 0.6% in September, rebounding after a 0.8% decline the month before.London's FTSE 100 was trading slightly lower as it snapped a five-day winning streak, its longest rally in five months. The benchmark index closed Wednesday's session at 6,571.59, its highest level since September 20th.With just hours to go before the US was due to hit its borrowing limit, both the Senate and House of Representatives passed a bill late on Wednesday night to fund the government through to January 15th 2014 and raise the debt ceiling until February 7th. Budget negotiations were also pushed back to December 13th.Standard & Poor's has estimated that the 16-day shutdown had already cost the US economy $24bn in lost activity, which will have a 0.6% adverse impact on gross domestic product growth in the fourth quarter. "The bottom line is the government shut-down has hurt the US economy," the ratings agency said.Nerves were also on edge after Chinese credit-ratings agency Dagong downgraded its rating for US sovereign debt from 'A' to 'A-', keeping a negative outlook.David Madden, Market Analyst at IG, said that markets are not celebrating and are instead showing concerns over the longer-term impact of the deal. "Investors simply view this as the government hitting the snooze button yet again," he said.FTSE 100: BSkyB, SABMiller impress with updatesSatellite television and broadband group BSkyB surged after recording a strong rise in first-quarter revenues after an increase of 800,000 paid-for subscription products. However, profits were down after a step-up in Premier League costs.Brewing giant SABMiller gained after saying its first-half performance had been in line with expectations as strong volume growth at its African business offset a challenging environment in parts of Europe. Sector peer Diageo was also higher after saying that a strong performance in US spirits helped to offset a weakening of growth in some emerging markets in the first quarter.Banking stocks Barclays and HSBC were among the fallers after Exane BNP Paribas raised concerns about the Prudential Regulation Authority's imposed capital ratios.Travis Perkins, the builders merchant, reported "encouraging" sales momentum in the third quarter but said that conditions in retail markets were "challenging", denting the share price early on. Mexico-focused precious metals group Fresnillo gained after retaining its silver output guidance for the full year following 7.6% production growth in the third quarter. Gold output, however, fell by nearly 10%.Packaging group Bunzl fell despite reporting 12% growth in third-quarter revenues helped by its aggressive acquisition strategy. The stock has risen by nearly a third already this year.FTSE 100 - RisersBritish Sky Broadcasting Group (BSY) 926.00p +5.47%SABMiller (SAB) 3,173.50p +4.39%Burberry Group (BRBY) 1,499.00p +2.39%ITV (ITV) 193.90p +2.00%Unilever (ULVR) 2,440.00p +1.71%Fresnillo (FRES) 950.00p +1.33%easyJet (EZJ) 1,295.00p +1.25%London Stock Exchange Group (LSE) 1,641.00p +1.23%Vodafone Group (VOD) 227.65p +1.18%Hargreaves Lansdown (HL.) 1,100.00p +0.92%FTSE 100 - FallersWeir Group (WEIR) 2,284.00p -2.31%Vedanta Resources (VED) 1,024.00p -2.10%Barclays (BARC) 278.05p -1.97%ARM Holdings (ARM) 1,010.00p -1.94%Melrose Industries (MRO) 298.00p -1.84%Meggitt (MGGT) 536.00p -1.83%TUI Travel (TT.) 370.00p -1.80%Standard Life (SL.) 357.00p -1.73%Travis Perkins (TPK) 1,748.00p -1.69%Aviva (AV.) 429.10p -1.45%FTSE 250 - RisersPolymetal International (POLY) 560.50p +6.76%Moneysupermarket.com Group (MONY) 152.70p +3.39%Big Yellow Group (BYG) 476.50p +3.36%Cairn Energy (CNE) 284.40p +3.04%Man Group (EMG) 85.35p +2.96%Rathbone Brothers (RAT) 1,570.00p +2.15%St James's Place (STJ) 652.50p +1.95%Kenmare Resources (KMR) 23.41p +1.78%Jupiter Fund Management (JUP) 384.70p +1.77%Aberforth Smaller Companies Trust (ASL) 985.50p +1.65%FTSE 250 - FallersRenishaw (RSW) 1,535.00p -8.41%Mitie Group (MTO) 302.70p -3.26%Chemring Group (CHG) 209.00p -2.79%Alent (ALNT) 341.20p -2.51%Afren (AFR) 144.20p -2.50%Ultra Electronics Holdings (ULE) 1,867.00p -2.46%Rank Group (RNK) 150.40p -2.34%Xaar (XAR) 782.00p -2.25%Spectris (SXS) 2,195.00p -2.23%RPC Group (RPC) 464.20p -2.09%BC