UPDATE 1-Turkish benchmark yields 19.57 pct at auction

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ISTANBUL, May 6 (Reuters) - The Turkish Treasury sold a net 755.6 million lira ($602 million) of its reissued Jan 13, 2010 benchmark bond at a higher-than-expected average yield of 19.57 percent at auction on Tuesday, central bank data showed.

The Treasury also sold a net 153 million lira of a reissued four year inflation-indexed bond at a price of 112.650 lira.

According to a Reuters survey, the Jan. 13, 2010 benchmark bond was seen yielding 19.55 percent and the Feb 15, 2012 inflation-indexed paper was seen attracting a price of 112.750 lira.

Total nominal bids for the benchmark were 1.71 billion lira, while bids for the four-year paper totalled 249.7 million.

In non-competitve sales before the auction, the Treasury sold 780.4 million lira of the benchmark and 244.5 million lira of the inflation-indexed bond. That made for overall net sales of both bonds of 1.9 billion.

Bankers in the survey had expected the Treasury to sell a total 1.7 billion lira of the benchmark, including non-competitive sales, and 800 million lira of the inflation-indexed bond.

The Turkish Treasury said last month it planned to borrow 4.5 billion lira from the domestic market in May against redemptions of 6.2 billion lira. It has another auction scheduled for May 27. (Reporting by Thomas Grove)