Picking your first shares in the Student Investor challenge

Start with the structure, not the companies

Most new teams make the same mistake: they open the platform, find a company they have heard of, and buy it straight away. Before you choose a single stock, decide how you will split the money. That decision shapes everything else.

Active vs Strategic — the first allocation call

The Challenge gives every team two separate virtual portfolios, each starting with £100,000. They work differently, and that difference matters from day one. The Active and Strategic portfolios have different trading rules: Active lets you trade every day and react to news in real time, while Strategic restricts you to a limited number of trades per month, forcing a longer-term view.

A sensible starting split is roughly equal weight across both books — similar cash in each, similar number of positions. Some teams skew 60/40 towards Active in the early rounds when there are more earnings announcements to react to, but the combined score rewards both, so neglecting either is a risk.

How much cash to keep back

Both portfolios carry the Windfall Tax: if either portfolio holds more than £15,000 in cash at the end of a trading day, you are charged £1,000 per day until you bring it below that level. The mechanic is deliberate — it penalises teams that sit on the fence and rewards those who put their money to work.

That said, keeping a small reserve makes sense. A good rule of thumb is 5–10% of each book held back as cash for opportunistic buys when a company falls sharply on news you already understand. More than that, and the Windfall Tax eats into your returns. Less than that, and you have no flexibility to act when opportunity appears.

Decide how many shares to hold

There is no perfect number, but most experienced teams land between 5 and 8 positions per portfolio in round one. Here is the logic behind that range.

Too few positions — say, two or three companies — and a single bad earnings result can wipe a significant chunk of your weekly gain. You are concentrated, which feels fine when you are right but punishing when you are wrong. Too many positions — say, fifteen or twenty — and you cannot follow them all meaningfully. You end up owning companies you have forgotten why you bought.

For most teams starting out, equal weighting is the simplest approach: divide your investable cash by the number of positions and put roughly the same amount into each. It avoids the temptation to bet the portfolio on a single conviction, and it gives you a fair comparison when you review what worked and what did not.

Think in sectors, not just names

The FTSE 100 is divided into sectors, and sector thinking is one of the quickest ways to build a more resilient portfolio. When you own companies from different sectors, a single piece of bad news — say, an interest rate decision hitting banks, or an oil price move hitting energy stocks — does not knock all your positions at once. That is the core idea behind diversification.

Sector	Type of company	Characteristic
Consumer Staples	Supermarkets, food & drink, household goods	Steady demand, lower volatility
Healthcare	Pharma, medical devices, biotech	Defensive; affected by clinical trial news
Financials	Banks, insurers, asset managers	Interest-rate sensitive; moves on BoE decisions
Energy	Oil majors, gas producers, renewables	Highly correlated with commodity prices
Technology	Chip designers, software platforms	Growth-oriented; can be volatile
Industrials	Defence, engineering, construction	Sensitive to government spending and global trade

A practical tip: avoid owning five companies from the same sector in round one. If a Bank of England rate decision hits Financials, all five of your positions move together — and not necessarily in the direction you want. Spreading across three or four different sectors means your portfolio does not live or die on a single macro event.

What makes a good Active pick?

Active is the portfolio where you can trade every day. That means you want companies with frequent news catalysts — things that give the share price a reason to move in the short term that you can act on.

Look for:

• Upcoming results days or trading updates. Companies post their earnings on a schedule, and those announcements regularly move prices 5–10% in a session. If you know a company is reporting results soon, you can form a view in advance.
• Macro sensitivity. Some shares respond predictably to broader economic events: energy companies to oil prices, banks to interest rate decisions, retailers to consumer confidence figures. If you understand the link, you can position before the trigger.
• Liquidity. Large-cap, heavily traded blue-chip shares move in real time on live prices. Smaller, less liquid companies can have wider bid-ask spreads, making it harder to buy and sell at the price you see.

Before picking an Active stock, ask: does this company report results soon? Is there a macro trigger coming that affects its sector? If the answer to both is no, it might be better suited to the Strategic book. The guide to how to research a share walks through a five-step process for evaluating any company before you buy.

What makes a good Strategic pick?

Strategic picks need a longer thesis because you have fewer chances to change your mind. You are not reacting to today's headlines — you are making a call about where this company will be over the next few weeks.

Look for companies with:

• A clear earnings growth trend. Companies that have been consistently growing profits tend to keep doing so in the short term. That gives your Strategic position a tailwind even if you cannot make daily adjustments.
• A defensive moat. Some businesses are simply harder to disrupt — strong brands, dominant market positions, long-term contracts. In a volatile market, that resilience becomes valuable.
• Exposure to a macro theme you believe in over weeks. If you think the BoE is likely to cut rates, bank shares might benefit. If you think defence spending will rise, Industrials could be the place to be. Strategic is where you act on a broader conviction rather than a single news story.

The trade limit in Strategic is a feature, not a bug. It forces you to develop a real view before committing, and it stops you from undoing a good position on a bad day. As the article on why holding beats trading explains, patience tends to compound — and the Strategic limit is the mechanism that enforces it.

A quick checklist before your first trade

Before you place any trade in either portfolio, run through this list. If you cannot answer yes to all five, hold off and do more research first. You can review the full rules any time on the rules page.

1. Have you read the company's most recent trading update? A results announcement or trading statement tells you far more about a company's direction than its share price alone.
2. Do you know which sector it is in, and whether you already hold a similar company? Owning two companies that respond to the same macro trigger doubles your exposure without improving your diversification.
3. Have you decided Active or Strategic — and does this company's trading pace match that book? A slow-moving defensive stock might be wasted in Active; a fast-moving, news-driven stock might be too unpredictable to leave locked in Strategic.
4. Does buying this leave at least 5% of the book as a cash reserve? Staying fully invested means you cannot act when something better appears. Keep a small buffer.
5. Can all four team members explain why you own it? If only one person understands the thesis, it is fragile. Shared understanding means the team can make a coherent decision together if news breaks and you need to act quickly.

Frequently asked questions

Should each of our four team members pick different shares?

Not necessarily by rule — but dividing research responsibility by sector means each member becomes the team’s expert on a slice of the market. One person tracks Financials, another follows Consumer Staples, and so on. That division tends to produce better-researched picks than four people all looking at the same companies.

What if our starting picks go down immediately?

A bad first week is not the end of the challenge. The league table updates continuously, and teams recover. The worst response is panic-selling at the bottom — you lock in the loss and miss the rebound. Hold your thesis unless the underlying reason for owning the share has actually changed.

Can we replace all our starting picks later?

In Active, yes — you can trade every day. In Strategic, you have a limited number of switches per month, so treat each one as precious. Think carefully before committing a Strategic trade, because once your monthly allowance is used, you cannot make further changes until the month resets.

Is there a safe sector to start in?

No single sector is always safe — but Consumer Staples and Healthcare are historically less volatile than Energy or small-cap Technology. That stability has a trade-off: lower upside in a bull run. The goal is not to find the safest sector but to spread across several so that no single decision wipes your week.