Asset allocation outlasts any list of stocks you pick

Does the allocation or the pick matter more?

The allocation matters more, for a reason of size rather than skill. An allocation sets how much of the portfolio sits in a whole sleeve, such as direct equity or a crypto index. A pick sets how much sits in one name inside that sleeve. A wrong pick can only cost what its weight allows, and a wrong sleeve size sets the weight of every name at once.

This piece uses the Sensex as evidence and a ₹1 crore portfolio as arithmetic. It makes no call on where any price goes. For the definition first, what asset allocation is covers the term in full.

What the Sensex list shows about picking

The Sensex is a list of 30 companies that its sponsor reviews and changes. The BSE Sensex entry on Wikipedia says the BSE reviews and modifies its composition so that the index reflects current market conditions. Nobody holds the original 30 by conviction. A rule removes what no longer fits and brings in what does.

Business Standard's Sensex@40 review tracks how the list changed. These are its figures:

• Family-owned companies were 21 of the 30 in 1990 and 18 of the 30 in its latest count.
• Multinationals were six in 1990 and two in the latest count.
• Public-sector companies were none in 1985 and four in the latest count.
• Banking, financial services and insurance had no representation in the 1985 list, and the 1990 list had one services exception, Great Eastern Shipping Company.
• Hindustan Motors and Zenith Steel were both in the 1990 list. Business Standard calls both now defunct.
• Seven companies in the 1990 list remain in the index, and five of that list have become defunct.

Source: Business Standard, "Sensex@40: Legacy companies make way for modern businesses on the index", updated 2 January 2026, read 1 November 2026.

The same article notes that the index in 1990 was led by manufacturing and industrial firms. Over the next fifteen years financial services and IT services arrived and replaced many of them. A holder in 1990 who picked ten of those names had no way to know which ones the next decade would remove.

Why a pick fails quietly

A bad pick rarely announces itself. The company stays listed, the price drifts, and the position sits in the portfolio looking like every other one. Hindustan Motors made the Ambassador car, and it sat in the 1990 list with the other 29. Its failure took years to show.

The allocation decision fails differently. It fails loudly, in a single month, because it moves the whole sleeve together. So the two decisions need different handling. A pick is controlled by keeping its weight small. An allocation is controlled by choosing the weight deliberately, in advance, and writing it down.

A ₹1 crore portfolio, sized two ways

Take a ₹1 crore portfolio with a ₹30 lakh direct-equity sleeve. Inside it sits one stock at ₹3 lakh, which is 10 percent of the sleeve and 3 percent of the portfolio.

Suppose that one stock falls 40 percent. The loss is ₹3,00,000 × 0.40 = ₹1,20,000, which is 1.2 percent of the ₹1 crore portfolio.

Now suppose the whole ₹30 lakh sleeve falls 40 percent, an illustration and not a forecast. The loss is ₹30,00,000 × 0.40 = ₹12,00,000, which is 12 percent of the portfolio.

The same percentage fall costs ten times more at sleeve level, because ₹30 lakh is ten times ₹3 lakh. The pick decided ₹1.2 lakh of the outcome, while the sleeve size decided ₹12 lakh, and the ratio holds for any sleeve and any fall.

Concentration risk follows the same logic. The cost of being wrong is set by how much sits in one place, and that is decided before the market moves.

What a rule does that a view cannot

The Sensex survives its own constituents because a rule does the replacing. A portfolio can borrow the idea. A target weight for each sleeve is the rule, and a rebalance is the act of restoring it.

Drift is why the rule matters. Say the ₹30 lakh equity sleeve rises to ₹36 lakh while the other ₹70 lakh stays flat. The portfolio is ₹1,06,00,000 and equity is now 36 ÷ 106 = 33.96 percent, against a 30 percent target. Restoring 30 percent means moving ₹1,06,00,000 × 0.30 = ₹31,80,000 into equity, which is a trim of ₹4,20,000 from the sleeve. The rule makes that trim without asking whether the rise will continue. What rebalancing does when one holding falls walks through the mirror case.

A held view works the other way. It waits for the price to confirm the story. Meanwhile the weight keeps drifting, and the sleeve becomes the largest decision in the portfolio without ever having been chosen as one.

Where a crypto index sits in this

A crypto sleeve is an allocation decision too, and the same arithmetic applies. Three percent of a ₹1 crore portfolio is ₹3 lakh. Whether that is the right size is a decision about the portfolio, and no single coin changes it.

Qatobit's QSI indexes are built for that decision. An investor holds a curated basket of digital assets, designed and rebalanced monthly by Qatobit on a published methodology, rather than picking coins and timing entries. The replacing is done by the methodology, the way a Sensex review does it for the 30 companies, and the investor's own decision is the sleeve size. Three of the four QSI indexes hold crypto, and QSI GEQ8 holds global equities. For how a basket is built, read how a crypto index works.

Frequently asked questions

Is asset allocation more important than stock picking?

Allocation sets the size of each sleeve, and a pick only sets the size of one name inside it. In a ₹1 crore portfolio, a 40 percent fall in a ₹3 lakh stock costs ₹1.2 lakh, while the same fall in a ₹30 lakh sleeve costs ₹12 lakh.

How many of the 1990 Sensex companies are still in the index?

Business Standard's Sensex@40 review says seven companies in the 1990 list remain in the index and five of that list have become defunct. Counts differ with the base year used, so the base year should be stated whenever a figure is quoted.

Who decides which companies are in the Sensex?

The BSE reviews and modifies the index composition so that it reflects current market conditions, according to the BSE Sensex entry on Wikipedia. The change is made by the index's rules, and no single holder decides it.

How often should I rebalance my allocation?

Rebalance on whatever schedule or band you set in advance and keep. A rule written before the market moves is what stops drift from making the allocation decision for you.

Is a crypto index an asset allocation decision?

Yes. The size of the crypto sleeve is the allocation decision, and the index's methodology handles the replacing inside it. Qatobit's QSI indexes are rebalanced monthly by Qatobit on a published methodology.

Crypto investments are subject to market risk. Not financial advice.