, . Brent 83 , WTI 80 , 81 . , , , . Morgan Stanley Goldman Sachs .
Goldman Sachs , . Morgan Stanley Brent 100 90 15 80 . , 50% 80% .
. . , , : , . . , .
, . 1983 , .
. , , .
, $81,40. $86,67 . $92,54. $74,85. , Oil $67,77 $59,90.
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