1. Informational edge: why it is dead for a private investor

Level 7: The four possible edges

Before you go looking for an edge it is worth defining one, because the word gets used with a looseness that ruins portfolios. An edge is not a good idea or a strong conviction: it is a concrete reason why you are going to get a better outcome than the person on the other side of your trade. If you cannot describe that person and explain why they are going to lose out to you, you do not have an edge, you have an opinion. In a market like the S&P 500 that reason can only live in four places, and this level walks through them one by one. We start with the oldest and, for you, the deadest.

What an informational edge actually is

You have an informational edge when you know a relevant fact about a company that the price does not yet reflect because almost nobody else knows it. It is worth separating three things that tend to get muddled together:

• Inside information. Material, non-public data obtained from within the company or from someone under a duty of confidentiality. Trading on it is a criminal offense. That is not an edge, it is criminal exposure.
• Poorly distributed public information. The data is public, but it reaches some people before others. This is where the classic informational edge lived, and it is exactly the channel regulators have spent twenty-five years closing.
• The mosaic. Assembling many public pieces, each irrelevant on its own, until they form a picture the market cannot see. It is legal, and it is what funds do when they commission surveys of thousands of customers or hire former industry executives as consultants. It costs millions a year.

Why it existed for almost two centuries

For most of stock market history information traveled physically, and whoever moved it first got paid for doing so. Annual accounts arrived by post weeks after the year end. To read a company report you had to write to the company and wait. Visiting a factory or meeting the finance director were, literally, ways of knowing sooner.

And there was something more important than the slowness of paper: it was standard practice for companies to hold calls with a select group of analysts and large shareholders in which they spelled out how the quarter was going before anyone else knew. It was not illegal, it was the normal way the trade worked. Anyone on that list had a real, repeatable informational edge over the rest of the market.

What changed: electronic filing and fair disclosure

Two things killed that business, and both are recent.

The first was mandatory electronic filing. In the mid-1990s the US public registry began receiving all listed company accounts in electronic form, freely and immediately accessible to anyone. The annual report that used to take weeks to obtain became available in the same second to a New York fund and to a retiree in Cuenca.

The second, and deeper, was fair disclosure. In August 2000 the US regulator approved a rule, in force from that same autumn, banning selective disclosure: if a listed company gives material information to an analyst or an institutional investor, it is obliged to make it public for everyone immediately. In Europe, the market abuse regulation has imposed an equivalent obligation of simultaneous publication since 2016. The result is not that the informational edge has become difficult: it is that the legal channel through which it flowed was closed by law. What is left of that channel is a crime.

Add the effect of coverage. The largest S&P 500 companies are followed by dozens of full-time analysts, and their accounts are read simultaneously by thousands of professionals whose job is precisely that. That you spot a fact in there that none of them has seen is not impossible, but it is not a plan.

Where genuine room is left, and why it is not in the S&P 500

It would be dishonest to say the informational edge has vanished from every market. Room still exists where these conditions hold:

• Very small, thinly followed companies, with one analyst covering them or none at all, where the work simply has not been done by anyone.
• Situations institutions cannot touch because of size: if a large fund cannot buy a meaningful position without moving the price, it does not spend resources studying it.
• Complicated structures, spin-offs, listed subsidiaries or companies with convoluted accounting, where understanding the whole demands an effort almost nobody makes.

And here is the point that closes the module. The S&P 500 is, by construction, the list of companies where none of those three conditions holds. Its entry criteria require a market capitalization counted in billions of dollars, high trading volume, enough shares in public hands and positive accounting profits in the latest quarter and in the sum of the last four. Anyone meeting all of that is, by definition, a very closely watched company.

Real case: when the SEC argued over which social network you may publish a figure on

In July 2012 the chief executive of Netflix wrote on his personal page on a social network, followed at the time by a few hundred thousand people, that monthly consumption of the service had passed one billion hours for the first time. The company did not publish that figure through its official channels. The US regulator opened an investigation into a possible breach of the fair disclosure rules and, in April 2013, decided not to impose a penalty and took the opportunity to clarify the standard: publishing on a social network is acceptable provided the company has given investors prior notice that it uses that channel.

Hold on to the scale of that argument. The debate was not whether someone had leaked a secret: it was whether a page followed by hundreds of thousands of people counts as 'public' or not. That is the regulatory bar you operate under. With that bar, no material data reaches you late. And, for exactly the same reason, none of it reaches you early.