The Government of India has given a bonanza to Indian middle class by increasing the Public Provident Fund PPF Limit from Rs. 70,000 to Rs. 100000. The Ministry of Finance has issued the necessary circular in this regard in December 2011. Apart from increasing the investment limit, the interest rates are also linked to market rates which will be reviewed and revised every year.
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http://www.investplaning.com/2012/01/ppf-limit-increased-to-rs-100000.html