Beyond the outer bound of arbitrability theories . . .

In USHealth Group v. South, applying Texas law, the Fifth Circuit rejected the use of “concerted misconduct estoppel” to compel arbitration against a nonsignatory (citing In re: Merrill Lynch Trust Co. FSB, 235 S.W.3d 185 (Tex. 2007)), and also found no basis for “direct benefits estoppel” because the claims did not arise solely from the contracts with the arbitration clause, and the issues in dispute could be resolved without reference to those contracts (citing In re: Weekley Homes, L.P., 180 S.W.3d 127 (Tex. 2005)).  No. 15-10117 (Dec. 8, 2015, unpublished).