This is not Entirely Govt. involve its all about Market Dynamics that got disturbed by Short Selling time to time. The Prices of Stock goes so high due to Satas and Badlas(Business Slangs used in KSE) people started Selling their Stocks and the Buyers are not willing to Buy at the existing Price Level and Market Went down till it Adjust to its Actual Position. These are quite Common Phenomenon in Stock Market and KSE is no way close to economic Speculator which Stock Market Suppose to be.