LONDON -- The FTSE 100 (INDEX: ^FTSE) was looking so good this week until it slumped more than 100 points yesterday afternoon in response to U.S. markets, and today it's not really moving at all. It's just 8.7 points up on the day to 5,800 as I write.

Still, that doesn't stop individual constituents of the FTSE indexes from having a good day. Here are three on the up.

Trinity Mirror (LSE: TNI.L)
Shares in publisher Trinity Mirror gained 3.8% to reach 68.75 pence on the release of an interim management statement. The firm has unexpectedly upgraded its full-year profit guidance, saying that adjusted operating profit will be pretty much the same as last year at about 104.5 million pounds.

The rerating comes from an improvement in advertising trends. Trinity Mirror has been able to cut its net debt by a further 19 million pounds in the quarter -- and by 59 million pounds for the year so far -- to 162 million pounds.

SuperGroup (LSE: SGP.L)
Fashion star SuperGroup, the owner of the Superdry brand, rose 6.2% to 700 pence after first-half group sales soared by 16.2% to 158.2 million pounds, with second-quarter sales up 20.3% to 98.4 million pounds. The company confirmed that it expects to meet current consensus forecasts for the full year, suggesting we'll see a 20% growth in earnings per share.

SuperGroup is looking increasingly like it has put its operational difficulties behind it, and the share price has now more than doubled since it crashed to earth earlier in the year.

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Gulf Keystone (LSE: GKP.L)
Gulf Keystone Petroleum has hit oil, sending its shares up 4.4% to 190 pence. The discovery -- at the Sheikh Adi Block in the Kurdistan Region of Iraq, in which Gulf Keystone is part of a production-sharing contract -- has uncovered oil at several different depths with an estimated aggregate flow of 4,235 barrels of oil per day.

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