Business Standard

Changing weights

Beating The Street

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Devangshu Datta New Delhi
 It should, in fact, have been implemented the instant PSUs started being listed. The first tranche of PSU selloffs was a token affair where tiny chunks of equity were disposed off at absurdly high prices.

 As a result, we have lived with an absurd anomaly in index calculations since the early 1990s.

 In stocks like Indian Oil, SAIL and SBI, the government held around 95 per cent of the equity, with only around 5 per cent being out on free float.

 This means that the difference in weights between the two methods of calculation was to the order of 20:1.

 The old method of assigning weights according to total market value made it extremely easy to manipulate index values by putting very little money on the table and concentrating on a PSU that had an unnaturally high index weight.

 A switch to weight by float cuts out those possibilities. It is still relatively easier to manipulate the price of a PSU with a low float.

 But such a stock no longer has a disproportionate weight in indices. The PSUs and other closely-held counters like Wipros will only regain their weighting pre-eminence if there are sellofs by majority shareholders.

 On the same lines, there are other technical changes that could help remove anomalies and smoothen trading. One such change seems long overdue.

 The minimum lot in the derivatives market is nominally a position of Rs 2 lakh in the given underlying.

 That is, in a stock priced at Rs 200, the minimum option position would be a position of 1000 options, covering Rs 2 lakh worth of the underlying.

 In practice, the minimum lot is often far more expensive than the Rs 2 lakh benchmark. The minimum lots were set at the time stock options were launched.

 In most, if not all eligible stocks, prices have changed dramatically. In most option stocks, the prices have risen substantially

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First Published: Sep 13 2003 | 12:00 AM IST

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