1 3 , ▁the ▁Dow ▁Jones ▁Indust rial ▁A verage ▁marked ▁another ▁dram atic ▁session , ▁with ▁the ▁index ▁( open ing ▁at ▁ 8 , 2 8 2 . 6 6 ) ▁that ▁after ▁a ▁mixed ▁start ▁t umbled ▁again ▁below ▁the ▁ 8 , 0 0 0 ▁mark ▁( to ▁a ▁low ▁of ▁ 7 , 9 6 5 . 4 2 ) ▁but ▁then ▁revers ed ▁the ▁tr end ▁and ▁gained ▁more ▁than ▁ 9 0 0 ▁points ▁( four th ▁largest ▁daily ▁swing ▁ever ) ▁in ▁less ▁than ▁three ▁hours ▁closing ▁at ▁ 8 , 8 3 5 . 2 5 ▁with ▁a ▁net ▁gain ▁of ▁more ▁than ▁ 5 5 0 ▁points ▁( third ▁largest ▁ever ). ▁ ▁The ▁prospect ▁of ▁a ▁federal ▁b ail out ▁of ▁failing ▁US ▁autom akers ▁appeared ▁dim ▁pending ▁the ▁inaug uration ▁of ▁Bar ack ▁Ob ama . ▁There ▁appeared ▁to ▁be ▁opposition ▁from ▁both ▁the ▁Republican ▁members ▁of ▁the ▁Senate ▁and ▁the ▁office ▁of ▁the ▁inc umb ent ▁president , ▁George ▁W . ▁Bush , ▁which ▁expressed ▁doubt ▁that ▁the ▁companies ▁could ▁be ▁salv aged . ▁ ▁At ▁the ▁inv itation ▁of ▁US ▁President ▁George ▁W . ▁Bush ▁the ▁leaders ▁of ▁the ▁G - 2 0 ▁held ▁the ▁initial ▁session ▁of ▁the ▁Sum mit ▁on ▁Fin an cial ▁Mark ets ▁and ▁the ▁World ▁Econom y ▁on ▁Saturday , ▁November ▁ 1 5 , ▁in ▁Washington , ▁D . C . ▁They ▁agreed ▁to ▁co oper ate ▁with ▁respect ▁to ▁the ▁global ▁financial