yes, they do not follow the market price in this case
there are slightly correction regarding my previous post. refer chart from wall street journal & bloomberg, (as reliable source) WTI price dropped until negative
in my opinion...assuming you had enough margin even price dropped to zero & didnt get margin call, your trade should be invalid and should be refunded. hypothetically speaking, if you are long and price went into negative zone, your long position is no longer losing, instead suppose to be making profit (if you close the position in negative zone) but of course, broker and trading system is not ready for negative price trading
however, if you do not have enough margin level to sustain price drop until zero & negative, the losing money would be on your own. btw, its not just you affected by this, interactive broker client lost around 104 million, but for those affected, company will reimburse the lost to customer as it is invalid
Code:
https://financefeeds.com/interactive-brokers-revises-estimate-loss-related-crude-oil-contracts-trading/
https://www.bloomberg.com/quote/CL1:COM
https://www.wsj.com/market-data/quotes/futures/CL.1?mod=md_cmd_overview_quote