had one of its strongest days since its inception Tuesday, with 18 out of the 21 components finishing higher.
The index ended at 1084.74, up 25.21 points, or 2.4%, from Friday's close. The spike leaves the TSC 21, which was designed to foretell the economy's direction, up 84.74 points, or 8.5%, from its start at 1000 on July 3.
The move came as the
Dow Jones Industrial Average
rallied late in the day, gaining 107.45 points, or 1.14%, to 9,523.27, while the
rose 31.03 points, or 1.71%, to finish at 1,841.48.
All three indices were helped by a jump in August manufacturing activity. The Institute for Supply Management said its manufacturing index last month came in at 54.7, which beat analysts' expectations and was up from July's 51.8.
Leading the advancers in the TSC 21 was
, which rose $1.24, or 8.13%, to $16.50. The airline maintained a rally that began Friday when
said it won't come out of bankruptcy this year.
( MYG) was the second-best finisher, gaining 85 cents, or 3.14%, to $27.95.
fell 67 cents, or 1.13% to $58.85, and media company
closed the day down 7 cents, or 0.3%, at $23.25.
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