I'm going over my 1099-B from my brokerage and I'm trying to understand why some of the trades are being marked as Wash Sales while other's under similar circumstances aren't. Here's an example set of transactions for one security (a broad market ETF), all lots of which were sold at a loss on the same day:
Bought Sold Loss Wash ======= ====== ====== ==== 8/14/15 9/1/15 ($30) NO 8/19/15 9/1/15 ($25) NO 8/24/15 9/1/15 ($5) NO 8/27/15 9/1/15 ($10) YES - adjusted to $(0)
There were no other trades in this security for the whole year and no dividends were reinvested. I have other securities that had a similar pattern (same buy/sell dates) that have a different lot selected as a wash sale and other securities (again, same pattern) that have no wash sales.
My brokerage also provided me with a raw transaction details and it looks like the lot purchased on 8/14/15 has a cost basis $10 less than the the loss reported on the 1099-B so everything seems to balance out and I don't need to make any adjustment to the cost basis as reported.
However, I'm still wondering, why is this transaction being highlighted as a wash sale?