Two questions to ask before you trade on any piece of market news
Two Questions Before You explained in plain English. Before you act on any market tip or rumour, Ian Lyall's two-question framework cuts through the noise.
There is a moment every private investor recognises. You are scrolling through your phone, or half-watching a financial news channel, and something catches your eye. A company you hold shares in. A rumour about a takeover. A post from someone who claims to have information. Your finger hovers over the dealing button.
The Short Version
- Two Questions Before You is useful only when the story is checked against numbers, risk and time.
- The headline idea can be right while the investor outcome is still poor.
- Private investors should test evidence, incentives, liquidity and downside before acting.
- The practical answer is to use the idea as a checklist, not as a shortcut.
What The Market Story Really Says
That moment, in Ian Lyall’s view, is the most dangerous one in investing. Not because the information is necessarily wrong, but because you have no reliable way of knowing whether it is right.
The London Stock Exchange guide to share prices is useful background because it explains how supply, demand and trading activity feed into the price investors see.
In 2021, a wave of retail enthusiasm on Reddit’s WallStreetBets community drove up the share price of GameStop, the American games retailer, to extraordinary levels before it crashed back down. The story made perfect emotional sense to those who participated: ordinary investors banding together to take on short-selling hedge funds. The underlying commercial reality, a struggling high-street retailer in a market moving to digital downloads, had not changed. The investors who bought late, seduced by the momentum and the narrative, paid a significant price.
What makes the source question genuinely difficult is that even legitimate sources are not always reliable in the ways that matter. A well-regarded City journalist, with a strong track record, may accurately report what a company’s investor relations team has told them. But the investor relations team’s job is to present the company’s position in the best possible light. An accurate report of a misleading briefing is still, at the level of what matters to you as an investor, a misleading report.
Disclaimer: The value of investments can go down as well as up, and you may get back less than you invest. This article is for informational and educational purposes only and does not constitute financial advice. Always do your own research and consider seeking independent advice before making any investment decision.
A useful way to test two questions before you is to ask what would have to be true for the idea to work. That turns a broad investing story into a small set of claims you can check.
Why Professionals See It Differently
Lyall spent years working as a market reporter in the City, watching how information travels from those who generate it to those who act on it. In that world, he learned something that most private investors discover only after a painful loss: the news that reaches you is almost never the freshest piece of the story. By the time a market-moving rumour is circulating on social media, or turning up in a journalist’s inbox, it has usually already done its work. The professionals moved first.
The UK has had its own version of this pattern. In 2022 and 2023, a number of small-cap shares on AIM saw coordinated promotional activity on social media platforms, driving sharp short-term price rises followed by equally sharp collapses. The stories attached to these companies sounded compelling. The reality, in most cases, was rather less so. The first question, does this make sense applied honestly, would have filtered out most of them.
This does not mean the financial press is useless, or that market news should be ignored. It means that the source question requires you to think not just about whether the journalist is trustworthy, but about whether the underlying source of the story has an interest in you believing it.
The next step is to ask what could break the case. Valuation, liquidity, funding pressure, management incentives and timing can all change a sensible idea into a poor result.
Where Private Investors Get Misled
The practical response to this, in Lyall’s framework, comes down to two questions. The first: does the story make sense? The second: do I really trust the source?
The second question is harder to answer because it requires a kind of self-awareness that is uncomfortable. Do you really trust the source? Not theoretically. Really.
The two-question framework is not a guarantee against bad trades. No framework is. Markets move on information that none of us can anticipate, and even the most rigorous analysis is sometimes overtaken by events. But the investors who consistently avoid the worst outcomes are rarely those who found some special predictive insight. They are the ones who learned to pause, ask whether the story makes sense and whether the source deserves their trust, and were honest with themselves about the answers.
This is why Cristoniq treats the checklist as part of the investment process. It does not remove risk, but it stops the decision resting on one attractive phrase.
The Signals Worth Testing
They sound simple. Most investors, if asked, would say they apply exactly this kind of thinking. The evidence from markets suggests otherwise.
The problem in modern markets is that the category of apparent sources has expanded enormously, while the actual reliability of those sources has not improved. A financial journalist writing for a regulated publication carries, at least in principle, a set of professional obligations. An anonymous account on X, with 200,000 followers and a confident tone, carries none. Yet the two can feel almost indistinguishable in the scroll of a busy news feed.
In a market where the noise has become deafening, that pause is worth more than most people think.
The Risk Behind The Pattern
Take the first question. When a piece of market news lands in front of you, the natural impulse is to ask whether it is true. But that is a different question from whether it makes sense. A rumour about a takeover bid for a company whose balance sheet makes it an unattractive acquisition target, from a buyer who has neither the cash nor the strategic logic to pursue it, may be technically unverified but feel plausible precisely because you want it to be true. You hold the shares. You have been waiting for a catalyst.
Lyall described the mechanics of this problem in the context of the City as it operated in the 2000s, when bulletin boards were the main arena for retail speculation. The operators who manipulated share prices on those boards understood that credibility was a currency that could be manufactured. They built reputations over time, posting accurate information on smaller matters until the moment when a false or misleading tip about a target company would be believed. The private investor, reading a confident post from an established contributor, had no practical way to separate the track record from the agenda.
This post is drawn from The Street-Smart Trader by Ian Lyall. Republished with permission.
How To Keep Your Judgement Clean
This is the trap. The story that makes emotional sense to a private investor is not the same as the story that makes commercial sense to a professional. Working backwards from what you want the market to do is not analysis. It is wishful thinking dressed in financial language.
The mechanics are identical today, operating at vastly greater speed and scale. A rumour about a UK company’s trading update, posted on X by someone whose account has previously been accurate, will travel through financial communities in minutes. The FCA has issued repeated warnings about market manipulation via social media, and has pursued enforcement actions against individuals who coordinated campaigns to move share prices and then sell into the resulting demand.
Street Smart is a series drawn from first-hand experience of the City of London, updated as each new chapter arrives.
A Worked Example
Imagine a reader is looking at two questions before you and trying to decide whether it matters in practice. The first mistake would be to accept the label without checking the details behind it.
A better approach is to list the claim, the evidence, the cost and the downside. If any one of those is unclear, the decision needs more work before it deserves confidence.
That small pause changes the whole exercise. Instead of reacting to a headline, the reader is testing whether the idea survives contact with real constraints.
What This Means For You
The useful point is not to memorise every detail of two questions before you. It is to know which questions make the topic safer to use.
Start with the plain-English version, then compare it with the evidence. The related Cristoniq guides on Dark pools, HFT and private investors and Market makers and your trades are good next checks.
If the idea still makes sense after that, you have a better basis for action. If it only works when the awkward details are ignored, that is the answer.
In Plain English
Two Questions Before You is not a magic phrase. It is a practical idea that needs context before it becomes useful.
The simple rule is to ask what the term means, what problem it solves, and what new risk it creates.
When those answers are clear, the topic becomes easier to judge. When they are vague, slow down.
This article is for general financial education only. It is not financial advice or personal investment advice. Investments can fall as well as rise, and you may get back less than you invest.
This post is adapted from The Street Smart Trader. Used with permission.