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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


(CAL) - Get Caleres, Inc. Report

, which rose $1.24, or 8.13%, to $16.50. The airline maintained a rally that began Friday when

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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.



(IR) - Get Ingersoll Rand Inc. Report

fell 67 cents, or 1.13% to $58.85, and media company



closed the day down 7 cents, or 0.3%, at $23.25.

Want to know more about the TSC 21? Click here for an introduction, here to view the latest stories and here to view the entire chart of 21 components, including the reasons for their inclusion.

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