Asian stocks today, June 30 -- Asian markets are trading mixed on Tuesday, 30 June, following Wall Street's overnight rally, fresh round of talks going between US and Iran.

Japan's Nikkei 225 remained volatile and traded largely flat and the Topix was down 0.65%.

South Korea's Kospi rose 1.17% at the open; however, it quickly reversed its gain to trade 1% lower. While the small-cap Kosdaq declined 0.41% on 30 June.

Australia's benchmark S&P/ASX 200 traded largely unchanged, while Hong Kong's Hang Seng index futures stood at 22,976, below the previous close of 23,026.68.

Overnight, Wall Street closed on a positive note, with a strong rally in chipmakers lifting the S&P 500 by 1.2% and the Nasdaq 100 by nearly double that gain on Monday...