Looking thru the lawsuit, I think the most relevant portions are:
1)
The equity tranche is at the bottom of the capital structure and the first to experience losses associated with deterioration in the performance of the underlying RMBS. Equity investors therefore have an economic interest in the successful performance of a reference RMBS portfolio.
(The structure by design is meant for a Long investor.)
2)
On January 8, 2007, Tourre attended a meeting with representatives from Paulson and ACA at Paulson's offices in New York City to discuss the proposed transaction. Paulson's economic interest was unclear to ACA, which sought further clarification from
GS&Co. Later that day, ACA sent a GS&Co sales representative an email with the subject line "Paulson meeting" that read:
"I have no idea how it went - 1 wouldn't say it went poorly, not at all, but I think it didn't help that we didn't know exactly how they [Paulson] want to participate in the space. Can you get us some feedback?"
(They clearly requested more information about Paulson's manner of participation.)
On January 10, 2007, Tourre emailed ACA a "Transaction Summary" that included a description of Paulson as the "Transaction Sponsor" and referenced a "Contemplated Capital Structure" with a "[0]% - [9]%: pre-committed first loss" as part of the Paulson deal structure. The description of this [0]% - [9]% tranche at the bottom of the capital structure was consistent with the description of an equity tranche and ACA reasonably believed it to be a reference to the equity tranche. In fact, GS&Co never intended to market to
anyone a "[0]% - [9]%" first loss equity tranche in this transaction.
(Probably the "misled" part - using phrasing that would lead them to believe that he was taking an equity stake, rather than an end-run via default swaps.)
Separately there was something about a Fabrice (internal GS?) e-mail that said something along the lines that the subprime mortgage market was rapidly deteriorating so there was not much time left to put the "deal" together. If the SEC has that e-mail, it would clearly show his intention to shaft ACA, given his January 10, 2007 e-mail to ACA's Paulson participation inquiry.
Antar's comment that GS is "circling the wagons" around Tourre now makes it a corporate issue., not just Tourre's (and his manager(s)).