Mexico stocks break losing streak; peso firms

(Recasts; adds details, closing prices)

* Stocks end four-session losing streak

* Peso firms; up 4 percent this year

* Bond prices rise for first time in four days

By Michael O'Boyle

MEXICO CITY, May 13 (Reuters) - Mexican stocks gained on Tuesday, led by gains in blue-chip shares such as top retailer Wal-Mart de Mexico and miner Penoles, while the peso held onto gains made on Monday.

The benchmark IPC stock index .MXX rose 0.82 percent to close at 30,887.40 points, snapping a four-session losing streak.

The peso <MXN=> MEX1 strengthened a marginal 0.04 percent to 10.477 per dollar at the official central bank close. The currency gained almost 1 percent on Monday.

The peso is up more than 4 percent since the beginning of the year as the spread between the U.S. target interest rate and Mexico's key rate widened to 5.5 percentage points, its widest since late 2005.