THIS IS CORRECT, explanation: box 11 (of 1099-B) is the "aggregate profit/loss for the reported year" -- this should be listed as GAIN in box 1(c) of form 6781 (see notes on back of form IRS-6781) AND amount of ZERO in box 1(b) (same form, 6781 as LOSS). Here is the math: 1099-B box.11 (aggregate P/L) = 1099-B box.8 (realized P/L) + 1099-B box.10 (unrealized P/L) - (MINUS) 1099-B box.9 (prior year unrealized P/L). NOTE: if the amounts in 1099-B boxes are negative (often listed in parentheses!) then one MUST include it! Example: if box.10 is negative (unrealized LOSS), then it is subtracted from box.8 etc. IMPORTANT: when subtracting amount of box.9 for prior year also account for its sign in addition to the subtraction (MINUS) sign. IMPORTANT: DO NOT LIST any of the 1099-B boxes 9 or 10 as LOSS in form 6781 box.1(b) - any amount of loss is computed by the above formula already!!!
