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Investment turning into trading

Also written Too many and too frequent transactions · Investment becoming trading · Overtrading by investors

The behavioural failure in which action bias drives so many and such frequent transactions that a long-term investment activity becomes a trading activity.

In plain language

Human beings find it very hard to do nothing. The workbook calls this the action bias — the need to do something.

Investing asks for the opposite. It asks for long-term consistency and long years of patience.

Put the two together and you get the failure this term names. Action bias, joined with other biases, pushes a client into too many and too frequent transactions. The activity is still called investing. In substance it has become trading.

The workbook quotes Paul Samuelson to make the point stick. Investing, he said, should be dull, more like watching paint dry or grass grow; if you want excitement, take your money to Las Vegas.

There is one cure in the workbook, and it is preventive rather than corrective. Prime the client in advance with the benefits of patience and long-term investing.

So the adviser's work here happens before the churn starts, not after it.

How it works

The chain the workbook sets out. Action bias is the starting point: the need to do something. Combined with other biases it induces too frequent and too many transactions, and the effect of that is to turn an investment activity into a trading activity.

Where this sits. Section 17.1 lists the behavioural failures an adviser meets in practice, and this is one of them. Its siblings in the same list are retail therapy, chasing past performance, home country bias, buying insurance for tax saving, too much diversification or a highly concentrated portfolio, the impact of framing on risk tolerance questions, and overconfidence with the dilution of risk management.

The remedy, in the workbook's words. The only way to induce the client to curb such a tendency is to prime them in advance with the benefits of patience and long-term investing. Section 17.2 generalises the idea: laying down advance ground rules that the client buys into gives the adviser built-in nudges. Its example is a rebalancing rule, which turns profit booking at high prices and buying at low prices into something already agreed rather than something argued about.

The workbook sets no threshold, and this is worth saying plainly. It gives no number of transactions, no turnover ratio and no holding period at which investment becomes trading. The only figure anywhere in the passage is the USD 800 inside the Samuelson quotation, and that is a rhetorical flourish about a casino, not a limit. A candidate quoting a transaction count for this concept would be quoting something the paper does not contain.

What the adviser can measure instead. The chapter's tools are qualitative and sit in section 17.3: the adviser stands between the client and the big mistake during the greed-and-fear cycle, and keeps the client on the journey planned in advance. Elsewhere in the syllabus the cost of churn shows up as an explicit expense — brokerage, GST at 18% on brokerage and transaction charges, securities transaction tax and Depository Participant charges on every sale. Those are Chapter 11 figures about transaction cost, not Chapter 17 figures about this bias.

A worked example

The transaction pattern below is illustrative; Chapter 17 sets no threshold of its own.

Mr Sundaram holds an equity portfolio of Rs 30,00,000 built for a retirement goal 17 years away. Over one year he makes 48 switches between schemes and shares, each averaging Rs 2,00,000, on the strength of news and tips.

His annual turnover is 48 x Rs 2,00,000 = Rs 96,00,000, or 3.2 times a portfolio he told his adviser he was holding for seventeen years. On the workbook's reading, this is no longer an investment activity.

What it costs him, using the transaction charges the syllabus does name. Take brokerage of 0.25% on each leg, GST at 18% on that brokerage, and STT on the sell side:

Cost headWorkingAmount
Brokerage, both legsRs 96,00,000 x 0.25% x 2Rs 48,000
GST on brokerage at 18%Rs 48,000 x 18%Rs 8,640
DP charges, 48 sale debitsflat charge per debit, irrespective of quantitya further recurring charge
Visible dragover Rs 56,000 a year

That is roughly 1.9% of the portfolio consumed before a single decision has been shown to be right. Repeat it for seventeen years and the compounding loss dwarfs the annual figure.

What the adviser actually does about it. Not a lecture after the fact. The workbook's remedy is priming in advance, so the adviser writes the ground rules into the plan at the outset: a fixed rebalancing trigger, an upper limit for each asset class, and a maximum exposure within an asset class. Once the client has bought into those, the next tip has to clear an agreed rule rather than an argument.

And note the bias it travels with. Section 17.1 also records overconfidence: a client whose small bet became a 5X in 3 months attributes it to skill rather than luck, and is then tempted to over-invest and modify the asset allocation. Action bias supplies the frequency; overconfidence supplies the conviction.

Why NISM asks about it

Chapter 17 (Behavioural Finance in practice), section 17.1 — Role of emotions in goal setting — carries this as one of its named behavioural failures, under the heading Too many and too frequent transactions, with the Samuelson quotation and the action bias explanation. Section 17.2 gives the advance-ground-rules nudge and section 17.3 the adviser's role in the greed-and-fear cycle.

Expect a match-the-bias question where a described client behaviour has to be identified, and a remedy question whose answer is priming the client in advance with the benefits of patience and long-term investing. The module-end questions for this chapter test the underlying biases — anchoring, mental accounting, prospect theory — rather than this heading directly, so learn the mechanism, not the label.

Common exam traps

  • The workbook gives no transaction count, turnover figure or holding period at which investing becomes trading. The USD 800 in the Samuelson quote is about a casino, not a threshold.
  • Action bias is the driver named in the workbook, not greed. Greed and fear belong to section 17.3, on managing client emotions through the market cycle.
  • The remedy is preventive. Priming in advance and pre-agreed ground rules, not a corrective conversation once the churn has happened.
  • This is not the same failure as chasing past performance. Chasing performance is about which asset is bought; this is about how often anything is bought. They appear as separate bullets in the same list.
  • Frequency is the defect, not activity itself. Rebalancing is also a transaction, and the workbook recommends it — because it follows a rule agreed in advance.
  • The costs of churning are taught elsewhere. Brokerage, 18% GST on brokerage, STT and DP charges are Chapter 11 material. Citing them as Chapter 17 figures for this bias misattributes the source.

Where this is taught

Free preparation for NISM Series X-B

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