The Nifty and Sensex continued their declining spree on July 18 and ended the week on a negative note. The Nifty 50 slipped below the 25,000 level and ended at 24,968.4, down by 143.05 points or 0.57 per cent. On the other hand the Sensex declined 501.51 points or 0.61 per cent at 81,757.73. Here’s a look at some of the key triggers which are likely to impact D-street this week: