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Stocks advance with all eyes on Fed chair's speech

Stocks rose on Friday ahead of a keenly awaited speech by US Federal Reserve Chair Kevin Warsh as investors seek clues about the outlook for interest rates amid stubbornly high inflation in the world's biggest economy. With the euphoria following US chip titan Nvidia's blistering earnings report petering out, attention is squarely on whether the US central bank will tighten monetary policy. Wall Street indices edged…