<p>Most Asian stock markets sank Friday as mixed economic data from the world's largest economy reinforced fears that investors have overestimated the recovery's strength.</p>
<p>Knocked by weak exporters, Japan's Nikkei 225 stock average fell 145.21 points, or 1.4 percent, to 10,238.20. Hong Kong's Hang Seng was down 179.11, or 0.9 percent, to 20,148.56 while China's Shanghai Composite index rose for a second day -- gaining 1.7 percent to 2,960.77 -- after rattling investors worldwide when it tumbled earlier this week.</p>