Plaintiffs, independent video retailers, sued Blockbuster Inc. (“Blockbuster”), its parent company Viacom Inc. (“Viacom”), and the home-video affiliates of the seven major Hollywood movie studios,2 alleging price discrimination and antitrust violations. The claims turn largely on the studios’ output revenue-sharing agreements with Blockbuster, whereby rental tapes are made available to Blockbuster for a low initial price in exchange for a portion of rental revenues and a long-term commitment to purchase all the movies released by each studio. At the close of the plaintiffs’ case-in-chief, the defendants moved for judgment as a matter of law (“j.m.l.”), which the district court granted. We affirm.

I.

Plaintiffs Ronald Cleveland, d/b/a Lone Star Videotronics, Phoenix-Merchant Investments Inc., d/b/a 49er Video, and The Big Picture Video Inc., are independent video retailers in competition with Blockbuster, a large national chain. The parties agree that by 1997, the home-video rental market was struggling. Under the pricing models prevalent at that time, neither independent retailers, such as plaintiffs, nor large chains, such as Blockbuster, had sufficient copies of “new release” titles available (“copy depth”) at the time customer demand was highest. The result was customers frustrated by their inability to rent the movies they most desired to see.

Until 1997, distributors serving independent retailers and large chains such as Blockbuster typically purchased tapes from the studios through traditional purchases for a set price or through “cherry pick” revenue sharing, neither of which options provided adequate copy depth. Beginning in late 1997, however, Blockbuster entered into long-term output revenue sharing contracts with the studios,3 enabling Blockbuster significantly to increase *739its new release copy depth, improving its ability to provide customers with desired titles.

Plaintiffs sued Blockbuster, Viacom, and the studio defendants, alleging that Blockbuster conspired with the studios to deny independent retailers long-term output revenue-sharing agreements functionally equivalent to its own. On the basis of these allegations, plaintiffs asserted claims under § 1 of the Sherman Act, 15 U.S.C. § 1; the Robinson-Patman Act, 15 U.S.C. § 13; and parallel California statutes.

II.

We review a j.m.l. de novo. Arguello v. Conoco, Inc., 330 F.3d 355, 357 (5th Cir. 2003). “A j.m.l. is appropriate only where ‘there is no legally sufficient basis for a reasonable jury to find for [a] party.’”4 To defeat a motion for j.m.l., the nonmovant must point to a conflict in substantial evidence. Casarez v. Burlington N./Santa Fe Co., 193 F.3d 334, 336 (5th Cir. 1999). Substantial evidence is evidence “of such quality and weight that reasonable and fair-minded men in the exercise of impartial judgment might reach different conclusions.” Id.

A.

Plaintiffs advance two theories of concerted action in violation of § 1. First, they allege a horizontal conspiracy among the studios that was orchestrated by Blockbuster. Specifically, they contend that, at Blockbuster’s instigation, the studio defendants conspired with each other to exclude independents from enjoying pricing terms similar to those provided to Blockbuster. Second, plaintiffs argue that Blockbuster’s separate agreements with the individual studio defendants constitute a series of vertical conspiracies to exclude independents from enjoying favored pricing arrangements.

Plaintiffs rely entirely on circumstantial evidence in support of their claims. In reviewing a j.m.l., we consider all evidence in the light most favorable to the nonmovant, Giles v. Gen. Elec. Co., 245 F.3d 474, 481 (5th Cir. 2001), and draw all inferences from the evidence in favor of the party opposed to the motion, id. In antitrust cases, however, “the range of permissible inferences is limited by particular principles of antitrust law.” Viazis v. Amer. Ass’n of Orthodontists, 314 F.3d 758, 762 (5th Cir. 2002) (citing Matsushita Elec. Indus. Co. v. Zenith Radio Corp., 475 U.S. 574, 588, 106 S.Ct. 1348, 89 L.Ed.2d 538 (1986)), cert. denied, — U.S. —, 123 S.Ct. 2078, 155 L.Ed.2d 1063 (2003). “Accordingly, evidence of conduct that is ‘as consistent with permissible competition as with illegal conspiracy1 cannot support an inference of conspiracy.” Id. (citing Matsushita, 475 U.S. at 588).

Therefore, in the absence of direct evidence of conspiracy, a plaintiff must introduce circumstantial evidence that “tends to exclude the possibility of independent action.” Monsanto Co. v. Spray-Rite Service Corp., 465 U.S. 752, 768, 104 S.Ct. 1464, 79 L.Ed.2d 775 (1984); Viazis, 314 F.3d at 762. Attempting to satisfy this standard, plaintiffs introduced documentary evidence and testimony concerning defendants’ parallel behavior. Neither, however, tended to exclude the possibility of independent conduct.

1.

First, plaintiffs rely on evidence demonstrating that Blockbuster planned to increase market share by “owning” the new release market. Plaintiffs also point to Blockbuster’s 1998 Business Plan, which projected increasing its market share from 25% to 50%, a goal plaintiffs argue is unreasonable absent some sort of favorable pricing.

*740Whatever these items of evidence are intended to prove, they cannot support an inference of conspiracy. A company can set ambitious competitive goals for itself, such as “owning” a portion of the market or significantly increasing its market share, without giving rise to a presumption that it intends to use illegal means to achieve those goals.

Plaintiffs also rely on the statement of a Fox vice-president that Blockbuster had requested a “special deal” and “did not want [that deal] to be given to independents.” The Fox officer also stated, however, that during the meeting at which that statement was made, Fox had refused to enter into any exclusive deal with Blockbuster.5

It is on the basis of this circumstantial evidence that plaintiffs attempt to establish concerted action. There is almost no evidence whatsoever, circumstantial or otherwise, that the studios engaged in any direct communication during their respective negotiations with Blockbuster or that any studio agreed, at Blockbuster’s request, not to make output revenue-sharing terms available to independents.

2.

Plaintiffs argue that in addition to the previously discussed circumstantial evidence, the studios’ parallel conduct gives rise to an inference of conspiracy. The mere fact that defendants followed similar courses of action, however, does not support such an inference.

The complained-of conduct is not the studios’ agreements with Blockbuster per se, but rather the alleged refusal of any of the studio defendants to deal with the independents on similar terms. That conduct constitutes an antitrust violation only if it is the result of an agreement6 rather than of each studio’s independent business judgment. Consequently, plaintiffs must present “significant probative evidence” that the studios’ parallel conduct “was contrary to their economic self-interest so as not to amount to a good-faith business judgment.” Royal Drug Co. v. Group Life & Health Ins. Co., 737 F.2d 1433,1437 (5th Cir. 1984).7

Plaintiffs support their contention that defendants’ conduct was contrary to their economic self-interest with conclusional *741testimony from their expert witness. That testimony is based in part on the simplistic assumption that because the studio’s received greater revenues under the terms of their deals with Blockbuster, they likewise would have received greater revenues under similar deals with distributors serving independents. This approach ignores significant differences between independent retailers and large chains such as Blockbuster. Such speculative and self-serving expert testimony is an insufficient basis for plaintiffs’ claims of concerted action.8

B.

To establish price discrimination, plaintiffs rely on the disparity between the prices plaintiffs’ distributors paid for tapes and the amounts paid by Blockbuster. The Robinson-Patman Act and the California Unfair Trade Practices Act, however, prohibit price discrimination only where customers are otherwise purchasing on like terms and conditions.9

As defendants point out, the transactions at issue here are not reasonably comparable. Most significantly, distributors servicing independents such as plaintiffs could select tapes title-by-title after box office results were known, while Blockbuster was committed to purchasing a studio’s entire output. Moreover, Blockbuster, unlike the distributors, undertook long-term obligations under its agreement with the studios. As a result of the significant differences among between the terms of the agreements, any disparities in amounts paid cannot support a claim for price discrimination.10

III.

Plaintiffs appeal the denial of their request for injunctive relief under 15 U.S.C. § 26, which authorizes district courts to provide relief “against threatened loss or damage by a violation of the antitrust laws.” We review a denial of injunctive relief for abuse of discretion. Peaches Entm’t Corp. v. Entm’t Repertoire Assocs., Inc., 62 F.3d 690, 693 (5th Cir. 1995). Consequently, we uphold a denial of injunctive relief unless the district court has relied on clearly erroneous factual findings or erroneous conclusions of law. N. Alamo Water Supply Corp. v. City of San Juan, 90 F.3d 910, 916-17 (5th Cir. 1996).

Plaintiffs argue that they are entitled to such relief even if their substantive claims are rejected, because the relevant statutes do not require actual injury, but merely threatened harm. The threatened harm, though, must be a result of “a violation of the antitrust laws.” 15 U.S.C. § 26.11 Be*742cause plaintiffs have lost on the issue of whether a violation occurred, they are not entitled to injunctive relief.

AFFIRMED.