NISM-Series-XXI-A: Portfolio Management Services (PMS) Distributors · Portfolio Management Process

Portfolio Construction and Investment Styles for NISM PMS Distributors

Updated 11 October 2026 · Fact-checked

Portfolio construction is how a manager selects and weights securities. Top-down starts with economy and sectors, then picks stocks. Bottom-up starts with individual companies. Active management tries to beat a benchmark; passive copies it. Growth style seeks fast earnings growth; value style seeks stocks priced below estimated worth.

Understand Portfolio Construction and Investment Styles

Portfolio construction means deciding what to buy, how much of each, and why. The manager turns the client's objectives, risk tolerance and constraints into an actual list of holdings with weights.

There are two broad ways to choose holdings. In the top-down approach, you start big. You look at the economy, interest rates and growth first. Then you pick favourable sectors. Last, you pick stocks within those sectors. In the bottom-up approach, you start small. You study a single company's business, management, earnings and valuation. You buy it if it looks good, whatever the sector or economy looks like. Many managers mix both.

The second choice is active versus passive. An active manager takes views and deviates from the benchmark index to try to earn more than it. This needs research and trading, so costs are usually higher, and the result can be better or worse than the benchmark. A passive manager holds securities in the same weights as an index and does not take views. Costs are lower, and the return is close to the index, less costs and tracking difference.

The third choice is investment style. A growth manager buys companies expected to grow earnings faster than the market. These often trade at high price multiples, so you pay for future growth. A value manager buys companies whose price looks low compared with earnings, book value or assets, expecting the price to move toward worth. Other styles include blend (a mix of growth and value), momentum (buying what has been rising), quality (strong balance sheets and stable returns), and market-cap based styles such as large-cap, mid-cap and small-cap.

No style wins every year. Growth tends to do well when growth is scarce and optimism is high. Value tends to do well when prices fall to cheap levels and then recover. As a distributor, you must match the style to the client's risk profile and objective, not to recent performance.

Key formulas to remember

Top-down sequence: Economy → Sector/Industry → Company; Moves from broad to narrow. The exam may ask you to put the steps in order.
Bottom-up sequence: Company → (Sector and economy are secondary); Stock selection drives the portfolio. Macro views matter less.
Active return: Active return = Portfolio return − Benchmark return; Positive means the manager beat the benchmark. Passive aims for active return near zero.
Price-to-earnings ratio: P/E = Market price per share ÷ Earnings per share; Growth stocks usually show high P/E. Value stocks usually show low P/E.
Price-to-book ratio: P/B = Market price per share ÷ Book value per share; A low P/B is a common value screen. It is not proof of a bargain.

How to solve Portfolio Construction and Investment Styles questions

Most questions test whether you can label a description with the right approach, management type or style. Use this method.

1Read the question and find the starting point: economy, sector or company.
2If it starts with the economy or sector, it is top-down. If it starts with company analysis, it is bottom-up.
3Check whether the manager follows an index. Copying index weights means passive. Taking views and deviating means active.
4Look for style clues. Fast earnings growth and high P/E point to growth. Low P/E, low P/B or a discount to worth point to value.
5Watch for absolute words like always, guaranteed or never. Rule out options that use them.
6For cost or return questions, remember passive is usually cheaper, and active may or may not beat the benchmark.
7Pick the option that matches every part of the statement, not just one part.

Quickest way: Clue-word scan

When to use it: Use it for definition and match-the-following questions when time is short.

Economy, interest rates, sector first: top-down.
Company financials, management, stock first: bottom-up.
Index replication, low cost, tracking: passive.
Views, stock picking, beat benchmark: active.
High growth, high P/E: growth. Cheap versus worth: value.
Eliminate any option with always or guaranteed.

Common mistakes in Portfolio Construction and Investment Styles

Saying active management always beats passive.
Students assume effort and research must give higher returns.
Fix: Active management aims to beat the benchmark but can lag it, especially after higher costs.
Mixing up top-down and bottom-up.
The words sound like they describe the size of the company rather than the starting point of analysis.
Fix: Top-down starts at the economy. Bottom-up starts at the single company.
Calling a low P/E stock a guaranteed bargain.
Value is taught with low multiples, so students treat low price as proof.
Fix: A low multiple is only a screen. The business may be weak. Value means priced below estimated worth.
Thinking passive means no decisions are made.
Passive is described as simple.
Fix: Passive still involves choosing the index and rebalancing to follow it. It has no stock views.
Treating growth stocks as low risk because earnings are rising.
Strong growth sounds safe.
Fix: Growth stocks often carry high valuations, so price can fall sharply if growth disappoints.
Recommending a style based on last year's returns.
Recent winners look attractive.
Fix: Match the style to the client's objective and risk profile. Past performance does not decide suitability.

Worked examples

Example 1

A portfolio manager first studies expected GDP growth and interest rate trends. She then selects the banking and infrastructure sectors, and finally picks the stocks within them. Which approach is this?

A. Bottom-up
B. Top-down
C. Passive
D. Value

Show the solution

Find the starting point. She begins with GDP and interest rates, which are economy-level factors.
Next she picks sectors, then stocks. This moves from broad to narrow.
Broad to narrow is the top-down sequence.
Passive and value describe management type and style, not the order of analysis. Bottom-up would start with the company.

Answer: B. Top-down

Example 2

A manager holds a portfolio in the same weights as the Nifty 50 and takes no views on individual stocks. Compared with an active manager, which statement is most likely correct?

A. The manager is following a passive strategy and usually has lower costs
B. The manager is following an active strategy and usually has lower costs
C. The manager is following a passive strategy and is guaranteed to beat the index
D. The manager is following a bottom-up growth strategy

Show the solution

Matching index weights with no views is index replication, so it is passive.
Passive needs less research and trading, so costs are usually lower. This supports option A.
Option B calls it active, which is wrong.
Option C says guaranteed to beat the index. A passive strategy aims to track it, not beat it.
Option D describes a stock-picking style, which does not fit.

Answer: A. The manager is following a passive strategy and usually has lower costs

Exam tips

Expect definition and scenario questions. Find the starting point of analysis first, then label it.
Reject options with always, never or guaranteed when they describe returns of any style.
Know the clue words for growth and value, including high P/E versus low P/E and low P/B.
Read the question for the client's profile. Suitability questions reward matching style to objective and risk.
NISM-Series-XXI-A has negative marking of 10% of the marks for a question, so avoid blind guesses but do eliminate options to improve your odds.

Practice questions from Portfolio Management Process

Portfolio Construction and Investment Styles in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Portfolio Construction and Investment Styles: frequently asked questions

What is the difference between top-down and bottom-up investing?

Top-down starts with the economy, then sectors, then stocks. Bottom-up starts with analysing individual companies and cares less about the macro view. Many managers use both together.

Is active or passive management better for a PMS client?

Neither is always better. Active aims to beat a benchmark but costs more and may lag. Passive tracks the index at lower cost. Suitability depends on the client's objective and risk profile.

How do growth and value styles differ?

Growth targets companies with fast expected earnings growth, often at high valuations. Value targets companies priced below estimated worth, often with low P/E or P/B. Both can work in different market phases.

Can a manager mix styles?

Yes. A blend style combines growth and value stocks. Managers may also combine top-down views with bottom-up stock selection.