(ShareCast News) - The FTSE 100 moved into the red as investors in heavweight shares took no comfort from the US Fed decision not to raise interest rates on Thursday. As the week wound down, the index of 100 leading shares was 115 points, or 1.87% lower at 6069.Glencore shares led the fallers, plunging almost 6% as the Investment Association and the National Association of Pension Funds criticised the commodities group for not considering all the company's shareholders equally when it issued $2.5bn worth of new shares to cut net debt.With the oil price taking another tumble, oil services group Weir fell 4%.Miners Randgold Resource and Fresnillo were top risers as the price of gold and silver rose. FTSE 100 - RisersRandgold Resources Ltd. (RRS) 3,856.00p +3.41%Fresnillo (FRES) 607.00p +2.88%AstraZeneca (AZN) 4,327.00p +1.32%Sainsbury (J) (SBRY) 226.80p +0.80%British Land Company (BLND) 811.00p +0.68%Land Securities Group (LAND) 1,231.00p +0.24% FTSE 100 - FallersGlencore (GLEN) 124.25p -5.98%Weir Group (WEIR) 1,232.00p -4.05%GKN (GKN) 273.90p -3.89%Ashtead Group (AHT) 966.00p -3.69%Royal Bank of Scotland Group (RBS) 314.60p -3.50%Aberdeen Asset Management (ADN) 325.80p -3.41%Barclays (BARC) 251.65p -3.38%Anglo American (AAL) 710.60p -3.37%Royal Dutch Shell 'A' (RDSA) 1,592.00p -3.19%Royal Dutch Shell 'B' (RDSB) 1,603.00p -3.17%