No,I think it is against the very purpose of setting these schemes as these schemes support the employees at the time of need.Employees themselves go for the investment in stock market if they are ready for this.These are small contribution kept aside for meeting specific needs.Stock market looks a good avenue during rise but at the time of fall it can brinf havoc.Altough move is to invest only 5% but still I think that will not a good one to put such type of funds in riskier avenues.