Mumbai, April 22 -- COMEX copper hovers around $6 per pound mark on Wednesday morning in Asia awaiting clarity on US-Iran negotiations. The recent tension in Middle East is seen hurting growth which typically hampers copper prices. The dollar index nudged up marginally above 98 mark, making greenback-denominated metals more expensive. Meanwhile, negative cues from equities are likely to limit upside in the counter which is currently holding up half a percent at $6.04 per pound. Asian stock markets are mostly lower on Wednesday, following the broadly negative cues from Wall Street overnight, amid the uncertainty about the ongoing war in the Middle East after U.S. President Donald Trump again extended the two-week ceasefire indefinitely until...