Contrarian indicator

Most indicators are read with the crowd: if a signal says "bullish," it is taken as good news for the market. A contrarian indicator is read the opposite way, at least at its extremes.

The logic is that when almost everybody has already leaned one way, there is nobody left to push the market further in that direction — and a reversal becomes more likely, not less. The Put-Call Ratio (PCR) is the workbook's worked example of this: instead of treating an extreme reading as proof the trend will continue, it is read as a warning sign that the trend may be exhausted.

This is a general way of reading sentiment data, not a specific formula — the mechanism, in every contrarian reading, is "extreme sentiment now, expect a turn soon."

Chapter 21, section 21.11.2, works through PCR as the contrarian example. PCR is calculated as put open interest ÷ call open interest, or put trading volume ÷ call trading volume. As a straight sentiment gauge, a PCR above 1 signals rising bearish sentiment, and below 1 signals rising bullish sentiment — with an average PCR of about 0.7 for equity options treated as the more reliable baseline, since traders tend to buy calls more often than puts.

As a contrarian indicator specifically, the reading flips at the extremes: a very high PCR can signal an oversold market, where traders might start buying calls in anticipation of a rebound; a very low PCR can signal an overbought market, where traders might buy puts in anticipation of a decline. The workbook is careful to flag the limitation directly: PCR should be weighed alongside other indicators, not traded on alone, and even a small shift in the ratio needs to be read correctly.

A genuine divergence in the workbook is worth stating plainly. Chapter 17's treatment of PCR — covered on the Put-call ratio page — reads a high PCR as bullish, because it reflects option writers' comfort being short puts rather than calls. Chapter 21's framing above reads a high PCR as signalling bearish sentiment building (with the contrarian twist that an extreme high can flip to a bullish reversal signal). Both chapters call PCR a contrarian indicator, but they read the plain, non-extreme direction of the same ratio oppositely — a genuine inconsistency in the workbook, not a simplification. A candidate should answer from whichever chapter the question names.

Using Chapter 21's framing: an index options series at a strike of 24,000 and a lot size of 50 shows put open interest of 21,000 contracts and call open interest of 10,000 contracts.

PCR = 21,000 ÷ 10,000 = 2.10
Notional per contract = 50 × 24,000 = Rs 12,00,000
Put-side notional = 21,000 × Rs 12,00,000 = Rs 25,200 crore

A PCR of 2.10 is far above both the 1.0 sentiment line and the 0.7 baseline — an extreme reading, backed by roughly Rs 25,200 crore of put-side notional. Read plainly, it signals heavy bearish positioning. Read as a contrarian indicator, that same extreme is treated as a sign the market may be oversold, and traders might start positioning for a rebound rather than for further declines — buying calls instead of chasing the bearish trend further.

A PCR near the 0.5 mark, by contrast, signals bullish sentiment plainly, and — at that low extreme — an overbought market where a contrarian trader might start considering puts.

Chapter 21 (Exchange Traded Interest Rate Options), section 21.11.2, introduces PCR and explicitly labels it a contrarian indicator, with the 0.7 baseline and the oversold/overbought reversal logic. Expect a question on what "contrarian" means for a sentiment indicator, and possibly one that requires knowing which chapter's PCR sign convention is being tested.

• "Contrarian" does not mean "always read backward." It means extreme readings are treated as reversal signals — the plain, non-extreme reading of the ratio still applies away from the extremes.
• The workbook itself is inconsistent on PCR's plain-reading direction between Chapter 17 and Chapter 21 — state both, and answer from the chapter a question names, rather than picking one convention as "the" correct one.
• A PCR near 0.7, not near 1.0, is the workbook's stated "normal" baseline for equity options — deviations from 0.7 matter more than deviations from 1.
• PCR is one input, not a standalone trading signal — the workbook explicitly warns it must be weighed against other indicators.