that he could advise them about the administration of the estate without a lawyer, he assumed the duty to furnish information that would enable them to act “with such care, foresight and diligence as an ordinarily sensible and prudent man would act with his own property under like circumstances.” Poindexter v. First National Bank of Winston-Salem, 244 N.C. 191, 194, 92 S.E.2d 773, 775 (1956). He could neither misrepresent nor fail to disclose the known hazards of the margin account and the stock he recommended. Further, regardless of churning, he could not propose retention of the margin account, or use it, to enhance his earnings in derogation of the estate’s interests. On the contrary, to avoid misleading the executors he would be obliged to suggest alternative investments in the estate’s interest, regardless of the effect on brokerage commissions. If the executors’ testimony is believed, there is no need for them to also prove that Burns had the specific intent to defraud or damage the estate. Globus v. Law Research Service, Inc., 418 F.2d 1276, 1290 (2d Cir. 1969).
On the other hand, if Burns’ testimony is accepted, he acted only as a broker. As such, he would be an agent for each separate trade without any interest beyond his commission. He would be obliged to execute his customers’ orders faithfully, but not to volunteer advice. Richardson v. Shaw, 209 U.S. 365, 374-77, 28 S.Ct. 512, 52 L.Ed. 835 (1908); Robinson v. Merrill Lynch, Pierce, Fenner & Smith, 337 F.Supp. 107, 110-113 (N.D.Ala.1971), aff’d, 453 F.2d 417 (5th Cir. 1972); Walston & Co. v. Miller, 100 Ariz. 48, 410 P.2d 658, 661 (1966). If he did offer advice, he would be required by Rule 10b-5 not to mislead by knowing falsehoods or concealment of material facts. Cf. Affiliated Ute Citizens v. United States, 406 U.S. 128, 92 S.Ct. 1456, 31 L.Ed.2d 741 (1972); Hanly v. S. E. C., 415 F.2d 589 (2d Cir. 1969).
The executors also assign error to the questions in the special verdict that required the jury to find that the executors reasonably relied on Burns’ conduct and that his conduct directly and proximately caused damages to the estate. The stringent requirements of the special verdict and its accompanying instructions unduly restricted the executors’ right to recovery. When a broker misrepresents a material fact, or in the circumstances shown by the plaintiffs’ evidence in this case, fails to disclose information that a reasonable investor would consider significant, it may be inferred that the customer would have relied on the broker’s statement or, in the case of non-disclosure, that he would have relied on the information had he known it. Affiliated Ute Citizens v. United States, 406 U.S. 128, 92 S.Ct. 1456, 31 L.Ed.2d 741 (1972). Affiliated Ute also teaches that causation can be established by proof of the misrepresentation or non-disclosure. 406 U.S. at 154, 92 S.Ct. 1456. The broker, however, may rebut these inferences by proving lack of reliance and, consequently, a lack of causation. Rochez Brothers v. Rhoades, 491 F.2d 402, 410 (3rd Cir. 1974).
Ill
Another element of the executors’ claim is the charge that Burns unlawfully churned the account during April, May, June, and July 1970. The district court submitted this issue to the jury, whose special verdict, however, did not clearly distinguish it from the other issues under submission. The court then granted summary judgment on the churning issue. The executors contend that the district court erred in framing the questions of the special verdict, in defining the measure of damages, and in ultimately granting summary judgment after the jury returned the special verdict.
In submitting the churning issue and' phrasing The special verdict, the district court instructed the jury that they should first determine whether the executors “lacked the intelligence, knowledge and experience necessary to enable them to manage the stock account . . . ” Only if they answered this question affirmatively were they to determine