LONDON -- While the FTSE 100 (INDEX: ^FTSE) muddles along, just 11 points up to 5,510 after losing all its recent gains due to the realization that everything in euroland is not actually coming up roses after all. The markets seem to be paying little attention to the interim reporting season that is upon us.

And though we have seen good results from some, a number of FTSE constituents are not doing so well. We look at three whose shares have dipped today.

Yell
Struggling Yell Group saw 36% of the valued wiped off its shares this morning, as they slumped to just 1.1 pence after the local business directory operator turned in disastrous results for the quarter ending June 30.

With revenue down 15% to 331 million pounds, EBITDA down 36% to 71 million pounds, free cash flow down 47%, and the firm struggling under net debt of 2.1 billion pounds, Yell announced that it is seeking a "new capital structure," which may result in a dilution of current shareholders interests; basically, it needs a massive cash injection, and that's likely to leave current owners with little.

Tullow (LSE: TLW.L)
Tullow Oil
saw its shares fall 4.5% to 1,308 pence despite releasing great-looking interim results. Pretax profit was up 48% to $829 million from revenue that rose 10% to $1.17 billion, while basic earnings per share climbed 63% to $0.603.

Part of that profit came from a farm-down of two-thirds of Tullow's interests in Uganda to CNOOC and Total, which may have taken the edge off the results and led to the fall. But a recent major discovery in Kenya should set the scene for another record year.

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BT (LSE: BT-A.L)
Shares in BT Group slid 4.4% to 208 pence after Q1 results showed a 6% fall in revenue to 4.5 billion pounds, largely due to the impact of eurozone weakness on BT's loss-making BT Global Services division.

Adjusted pretax profit was actually up 8% at 578 million pounds, with adjusted earnings per share up 10% to 5.7%. And for dividend seekers, BT still looks good: The forecast payout for the full year is 4.8%, and BT has a policy of boosting its dividend by 10% to 15% per year over the next few years.

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Alan does not own any shares mentioned in this article. Motley Fool newsletter services have recommended buying shares of TOTAL. The Motley Fool has a disclosure policy. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. Try any of our Foolish newsletter services free for 30 days.