BP has now dropped 14% today alone, and who knows how many percent over the past month. Here are the biggest shareholder losers: #1: State Street, with 43.4 million shares has lost $260 million today, #2: Wellington, 34.8mm, $209 million, #3: Barrow Hanley, 16.7mm, $100mm; #4: Bank of America, 13.9mm, $83mm; and #5: State Farm, 13mm, $78 million. That's half a billion in losses for the top 5 holders today alone. And this list doesn't even include Anadarko, Transocean, or Halliburton. That's some serious dumb money margin calls coming at the end of trading today.