SPREADS The May/July Chicago wheat spread is beginning to invert once more, trading from 3-4c.  July/Dec corn trades out to 19c from 18 1/4c.  July/Nov beans narrows into 4 1/2c from 6 3/4c.  May/July meal trades out to $5.50 from $4.60, while July/Dec trades from $5.20 from $6.00.   PALM OIL July up 53 ringgits, or 2.6%.  Palm oil climbed higher following soyoil futures and a slightly improved pace of exports.  Intertek estimated palm oil product exports during April at 1.174 mln mt, up 3.8% vs. March. NEWS Stocks are down 250 pts as more than 3.8 mln laid-off workers have applied for unemployment benefits last week as the US economy slides further into a crisis that is the worst since the 1930's.&nb...