The government has kept the interest rates unchanged on small savings schemes like PPF, Kisan Vikas Patra & Sukanya Samriddhi for October-December quarter. Investments in public provident fund scheme will fetch annual rate of 7.8%, while Kisan Vikas Patra investments will yield 7.5%. Since April last year, interest rates of all small saving schemes have been recalibrated on a quarterly basis.