How to trade around takeover announcements — and what the professionals know that you don’t

The moment a takeover bid is announced, the game is almost always already over for the retail investor. By the time the news hits your screen, the professionals have been aware of what was coming for days, sometimes weeks. That is not speculation. It is how the City works.

Bid situations are some of the most information-rich environments in all of financial markets. They involve lawyers, investment bankers, public relations advisers, accountants, and printers. Sometimes they involve leaked conversations in restaurants, phone calls to old contacts, and tips passed between colleagues. The circle of people who know something is brewing tends to be far larger than the formal list of insiders would suggest.

This creates a structural problem for private investors. By the time a bid is announced, the share price has often already moved substantially. Look at almost any takeover chart and you will see the same pattern: a quiet period, then a gradual drift upward in the weeks or days before the announcement, then a sharp gap on the day itself. Ian Lyall describes this clearly in the book. The line representing the share price sits flat for a long period, begins to rise before anyone outside the deal team is supposed to know anything, and then jumps dramatically when the news becomes public. The private investor who buys after the announcement captures only a fraction of the gain. The professional who positioned earlier captures most of it.

The question, then, is not how to get into bids before they are announced, which is something most private investors cannot safely do, but how to trade around bid situations intelligently once they are in the public domain.

When a takeover offer is made, the bidder announces a price per share. That price will almost always be at a premium to where the shares were trading before the bid, typically somewhere between 20 and 40 per cent, though the range varies enormously depending on the sector, the strategic rationale, and how much the bidder wants the deal done. The premium is designed to persuade shareholders to sell. If the premium is thin, shareholders may resist. If it is generous, most will accept.

The key question for a private investor who holds shares in a company that has just received a bid, or who is considering buying into one, is whether the offer price represents full value. The fact that a bid has been made does not mean the price is fair. It means a buyer has made an opening move. Whether that opening move is generous or mean depends on the circumstances of the company, the sector it operates in, and the strategic value it holds for the acquirer.

Companies often receive bid approaches that they reject as undervaluing the business. In those cases, the board will typically advise shareholders not to accept. Sometimes a higher offer follows. Sometimes it does not. The private investor who buys in expecting a higher bid is making a judgement call, and judgement calls in bid situations can go wrong quickly. If a bid lapses, the share price will fall sharply back toward where it was before the speculation began.

One of the most important signals in a takeover situation is unusual trading volume before any announcement. When a share trades two or three times its average daily volume on no apparent news, and the price begins to drift upward without obvious explanation, that warrants attention. It does not always mean a bid is coming. There are other reasons for unusual activity. But in practice, unexplained volume spikes in smaller companies are often followed by corporate announcements within days. Watching volume is not insider trading. It is observation. Any private investor with access to a basic charting tool can monitor this without difficulty.

Competing bids add a different layer of complexity. When a company attracts more than one suitor, the price tends to be driven higher as bidders compete for control. UK takeover rules, which are administered by the Takeover Panel, have been designed partly to ensure that a competitive process can develop if there is genuine interest from multiple parties. The panel sets deadlines, controls the disclosure of information, and tries to ensure that all bidders have access to the same material. In practice, the process still heavily favours those with more resources and more advisers. But the existence of a competing bid, or the realistic prospect of one, changes the calculus for private investors considering whether to accept an offer or hold out.

Offer premia need to be assessed against the long-term value of the business, not just the pre-bid share price. A 30 per cent premium on a share that has already fallen 40 per cent from its highs is not necessarily a generous offer. Context matters. Private investors who have held a stock for years and who know the business well are often better placed than they realise to judge whether an offer represents genuine value or a case of a bidder getting the asset cheaply.

The information environment around takeovers has changed considerably since the early 2010s. Social media has accelerated the spread of rumour. Anonymous accounts on X and Reddit have been used to move share prices in smaller companies, sometimes on the basis of publicly available information, sometimes through coordinated activity that sits in considerably greyer territory. The FCA monitors market activity around corporate announcements and investigates suspicious trading patterns. Its enforcement record in this area has been more active over the past decade than in the years before 2010.

The structural advantage still lies with professionals. The lawyers who draft the documents, the bankers who run the deal, and the PR advisers who control the message all know more than the public does, and they know it earlier. That does not mean private investors have nothing to work with. Watching share price movements, monitoring volume, understanding how offer mechanics work, and knowing when a bid looks thin rather than generous are all practical tools that cost nothing to develop. The City operates on information asymmetry. Being aware of how deep that asymmetry runs is the first step toward navigating it sensibly.

This post is drawn from The Street-Smart Trader by Ian Lyall. Republished with permission.

Street Smart is a series drawn from first-hand experience of the City of London, updated as each new chapter arrives.

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.

This article is for informational purposes only and does not constitute financial advice. Investment values can go down as well as up. Always do your own research before making any financial decisions.