How did RBI pull bond yields below the crucial 6% mark?

MUMBAI: The benchmark bond yield dropped well below the crucial 6 per cent mark on Thursday, calming the debt market in a development that will help lower the federal funding costs at a time when New Delhi is seeking to borrow more.While the Reserve Bank of India (RBI) is suspected to have intervened in the secondary market, it also accepted additional bids in a special auction held on Thursday offering yields slightly higher than market