Issue: Can a court assume that a plaintiff who purchased a company’s stock in the open market relied
on its misstatements?
Excerpts from Chief Justice Robert’s Decision: The traditional (and most direct) way a plaintiff can
demonstrate reliance is by showing that he was aware of a company’s statement and engaged in a
relevant transaction—e.g., purchasing common stock—based on that specific misrepresentation. In
Basic, however, we recognized that requiring such direct proof of reliance would place an
unnecessarily unrealistic evidentiary burden on the Rule 10b-5 plaintiff who has traded on an
impersonal market. That is because, even assuming an investor could prove that he was aware of the
misrepresentation, he would still have to show a speculative state of facts, i.e., how he would have
acted if the misrepresentation had not been made.
To address these concerns, Basic held that securities fraud plaintiffs can in certain circumstances
satisfy the reliance element of a Rule 10b-5 action by invoking a rebuttable presumption of reliance,
rather than proving direct reliance on a misrepresentation. The Court based that presumption on what is
known as the “fraud-on-the-market” theory, which holds that the market price of shares traded on
well-developed markets reflects all publicly available information, and, hence, any material
misrepresentations. The Court also noted that, rather than scrutinize every piece of public information
about a company for himself, the typical investor who buys or sells stock at the price set by the market
does so in reliance on the integrity of that price—the belief that it reflects all public, material
information.
At the same time, Basic emphasized that the presumption of reliance was rebuttable rather than
conclusive. Specifically, any showing that severs the link between the alleged misrepresentation and
either the price received (or paid) by the plaintiff, or his decision to trade at a fair market price, will be
sufficient to rebut the presumption of reliance. So for example, if a defendant could show that the
alleged misrepresentation did not, for whatever reason, actually affect the market price, or that a
plaintiff would have bought or sold the stock even had he been aware that the stock’s price was tainted
by fraud, then the presumption of reliance would not apply. In either of those cases, a plaintiff would
have to prove that he directly relied on the defendant’s misrepresentation in buying or selling the stock.
Halliburton [argues] that overwhelming empirical evidence’ now suggests that capital markets are not
fundamentally efficient. To support this contention, Halliburton cites studies purporting to show that
public information is often not incorporated immediately (much less rationally) into market prices. [But
e]ven the foremost critics of the efficient-capital-markets hypothesis acknowledge that public
information generally affects stock prices. That the price of a stock may be inaccurate does not detract
from the fact that false statements affect it, and cause loss, which is all that Basic requires.
Halliburton has not identified the kind of fundamental shift in economic theory that could justify
overruling a precedent on the ground that it misunderstood, or has since been overtaken by, economic
realities.
Question: What was the holding in Basic?
Answer: Basic held that securities fraud plaintiffs can in certain circumstances satisfy the reliance
Question: What was the rationale for the holding in Basic?
Answer: The court recognized that requiring such direct proof of reliance would place an
unnecessarily unrealistic evidentiary burden on the Rule 10b-5 plaintiff who has traded on an
Question: What was the basis of Haliburton’s argument in this case?