Is there an API to gather performance attribution for various positions? I have a paper portfolio running with around 450 stock positions. The portfolio has recently experience an outsized loss and I’m trying to understand which security (or securities) on a particular day lead to this huge move.
Currently the web POSITIONS page leaves a lot to be desired in terms of your ability to understand how the aggregate portfolio P&L was driven each day, historically. As far as I can tell, the POSITIONS page, for example, while purporting to show TOTAL P&L doesn’t seem to be accurate, since if I add up all the losses they don’t come close to what the HOME page shows on the line chart (i’m assuming this line chart is unrealized P&L? But there’s no tittle so it’s not obvious either).