USA-BUDGET/The news that China is engaged in talks over the building of a rival to the Panama Canal ought to set alarm bells ringing in Washington – and not just because of its obvious geopolitical implications. It is yet another sign that the Chinese have finally woken up to the fact that relending their hoard of dollars straight back to the USA is not a very smart policy, at least not as long as the Federal Government carries on spraying out greenbacks like a tipsy GI on furlough, and without Chinese support, the outlook for the Treasury bond market looks threatening.