KARACHI (Reuters) Karachi share market dipped to a two-and-a-half month low on Wednesday as world stocks tumbled and cautious investors, concerned over security in Karachi, Pakistans financial hub, sold shares. The Karachi Stock Exchanges benchmark 100-share index ended 2.33 per cent, or 284.61 points, lower at 11,941.72, its lowest close since May 19. Volume rose to 46.11 million shares, compared with 14.94 million shares traded on Tuesday. There is concern on the security situation about Karachi and in the absence of any buyers, we saw the market plunge by almost 300 points, said Sajid Bhanji, director at Arif Habib Ltd. According to officials, more than 300 people were killed in Karachi in July aloneone of the deadliest months in almost 20 yearsand at least 35 people over the last two days. Dealers said a fall in global stocks also left foreign investors cautious. World stocks tumbled towards five-month lows on Wednesday, and top-rated government bonds rallied as worries grew that fiscal cutbacks and stagnating factory output would prolong a global economic slowdown and aggravate Europes debt crisis. In the currency market, the rupee recovered from Mondays record low amid lack of import payments, but dealers expect the local unit to stay under pressure for now. The rupee closed at 86.52/60 to the dollar, firmer than Mondays close of 86.75/80 on Saturday. It hit a record low of 86.83 on Monday and banks were closed on Tuesday. Dealers said dollar payments are typically higher in July and August because of stronger oil demand and debt payments. As well as oil payments, the International Monetary Funds (IMF) stalled aid programme to Pakistan is also weighing the rupee down. The IMF has criticised the government for its patchy implementation of fiscal reforms and has held back the sixth tranche of an $11 billion loan programme since August last year. IMF and Pakistan officials were due to meet in July, but the meeting has been delayed and no new date has been announced. A cut in the key policy rate by the central bank over the weekend was also likely to accelerate the rupees slide, said another dealer at a major local bank.