London's blue chips registered an average fall of 2.77% on Monday as a steep sell-off in the heavyweight mining sector dragged the Footsie down to 5,544, 158 points off Friday's close of 5,702. Just three stocks finished the day with gains.The steady decline continued following a dreary start on Wall Street, with the US benchmarks taking a tumble after some manufacturing data came in below expectations. Meanwhile, markets in Europe fell by around 3-4% as the troubled banking sector registered some heavy losses.MINERS TUMBLE, TRACK METALS LOWER Dollar-denominated commodities became more expensive today as the greenback strengthened, after Japan intervened in foreign exchange markets to weaken the yen. The Japanese Finance Minister Jun Azumi indicated that intervention will continue until he is satisfied. Meanwhile, the China Iron & Steel Association announced today that iron ore prices could fall even further in the near future, as steel mills in China remain unwilling to buy, while stockpiles at major ports still remain high. "In my personal opinion, the price of imported iron ore will fall further, because the trends for the whole sector are unlikely to get better and steel mills don't dare to buy ore," said vice-chairman Zhang Changfu at a press conference. The news sparked a steep sell-off in the mining industry today, with Vedanta Resources, Kazakhyms, Xstrata, Antofagasta, Anglo American, Lonmin and Rio Tinto all falling over 6.5%. Mining peers New World Resources and Talvivaara Mining also took a hit on the FTSE 250.BANKS TAKE A HITBarclays fell by 2.93%, despite being the highest riser early on, after releasing its third quarter results. At first glance, Nomura was a fan of the results, but after a conference call with the bank, the broker said that it now has a "less positive reaction". "After the recent rise in the shares and following numbers that were below estimates on an underlying basis, we think some consolidation may be in order," Nomura said. Nevertheless, the broker still said that it prefers Barclays to other domestic UK banks. Accordingly, fellow lenders RBS and Lloyds dropped by a more dramatic 7.8% and 7.6%, respectively.Meanwhile, Shire was performing relatively well, falling just 0.56% after Credit Suisse reiterated its outperform recommendation and 2,350p target on the stock. Emergency repair services firm Homeserve saw its shares plummet over a quarter after the group announced that it is to suspend its telesales operation after an independent review. The stock was hit with numerous broker downgrades following the announcement: Citi reiterated its sell rating and cut its target price from 430p to 400p; Brewin Dolphin downgrade from buy to sell; Peel Hunt downgraded from hold to sell; while Investec put its buy rating under review. ECONOMIC NEWSIn economic news, the growth rate of the UK's money supply (M4), excluding intermediate 'other financial corporations' (OFCs), increased by £3.4bn in September, compared to an average monthly increase of £3.5bn in the previous six months. The three-month annualised growth rate was 4.9%, following a 3.8% pace the month before, according to the latest data out from the Bank of England. Consumer credit grew by a more-than-expected £0.6bn in September, between £100m and £200m faster than in the previous three months. The twelve month rate of change increased to 2.5% from 2.3%. Despite this, total lending only rose by the same average amount as in the past six months, by £1.0bn. The reason for that appears to have been the slow-down in lending secured on dwellings, which moderated to a £0.3bn pace, down from the six month average of £0.6bn. BCFTSE 100 - RisersGlaxoSmithKline (GSK) 1,400.00p +1.16%Morrison (Wm) Supermarkets (MRW) 302.20p +0.30%BT Group (BT.A) 188.10p +0.11%FTSE 100 - FallersVedanta Resources (VED) 1,278.00p -8.97%Kazakhmys (KAZ) 927.50p -8.80%Royal Bank of Scotland Group (RBS) 24.23p -7.84%Xstrata (XTA) 1,045.50p -7.68%Lloyds Banking Group (LLOY) 32.49p -7.55%Antofagasta (ANTO) 1,167.00p -7.01%Anglo American (AAL) 2,293.50p -6.84%Lonmin (LMI) 1,088.00p -6.69%ICAP (IAP) 404.10p -6.59%Rio Tinto (RIO) 3,385.00p -6.49%