science

SMI Expanded

SMI Expanded is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand SMI Expanded rather than just read about it. In short: The SMI Expanded is a capitalization-weighted stock index of large-cap and mid-cap companies listed on the SIX Swiss Exchange. It is made up of the components in the Swiss Market Index (SMI) and in the SMI MID, representing more than 90% of the total SPI market capitalization.

Key takeaways

SMI Expanded belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SMI Expanded to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SMI Expanded from memory before moving on to harder problems.

Reference excerpt

The SMI Expanded is a capitalization-weighted stock index of large-cap and mid-cap companies listed on the SIX Swiss Exchange. It is made up of the components in the Swiss Market Index (SMI) and in the SMI MID, representing more than 90% of the total SPI market capitalization. It was created on November 15, 2004, and retroactively computed from January 3, 1996, with a calibration on 1,000 points as of December 31, 1999.

Current constituents The current 50 constituents are the 20 large-cap companies listed on the Swiss Market Index (SMI) page and the 30 mid-caps listed on the SMI MID page.

Notes and references

Worked examples

Example 1 — a first encounter with SMI Expanded

Start with the simplest possible case. Write down what SMI Expanded claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to SMI Expanded before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about SMI Expanded ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of SMI Expanded

In research: SMI Expanded appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses SMI Expanded in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: SMI Expanded is common in secondary-school and first-year university syllabi. It links to neighbouring topics Finance stubs, Stock market, Swiss stock market indices, so understanding it makes those chapters shorter.
In everyday life: Look for SMI Expanded outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study SMI Expanded in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SMI Expanded means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain SMI Expanded out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SMI Expanded in simple terms?

Why does SMI Expanded matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study SMI Expanded?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on SMI Expanded.