A promoter who wants cash without selling can borrow against the shares instead. The lender takes the shares as collateral, applies a haircut, and holds the right to sell them if the collateral value falls below an agreed level. That is a pledge, and the promoter has to tell the exchanges about it.
The disclosure sits in Regulation 31 of the SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011. The promoter must disclose creation, invocation and release of encumbrance within seven working days of the event, to every stock exchange where the shares are listed and to the company at its registered office. Regulation 31(4) adds a yearly declaration that no encumbrance beyond what was already disclosed exists.
Pledge is a subset of encumbrance
The two words are used interchangeably in commentary and they are not the same thing. Regulation 28(3) defines encumbrance to include any restriction on the free and marketable title to shares, by whatever name called; pledge, lien, negative lien and non-disposal undertaking; and any covenant, transaction, condition or arrangement in the nature of an encumbrance. Pledge is one item on that list. A non-disposal undertaking carries no margin call at all but still restricts the shares.
| What you read | Where it comes from | What it tells you |
|---|---|---|
| Pledged shares as a share of promoter holding | Quarterly shareholding pattern | How levered the promoter is against the stock |
| Pledged shares as a share of total share capital | Quarterly shareholding pattern | Size of the potential overhang relative to the whole capital |
| Creation or release events | Regulation 31 filings, within seven working days | Direction and rough timing of the change |
| Invocation | Regulation 31(2) filings | The lender has taken the shares and may already be selling |
The forced-sale spiral
The mechanism is arithmetic, not sentiment. The price falls, the collateral is worth less, the lender calls for a top-up. The promoter pledges more shares or repays. If neither happens, the lender invokes the pledge and sells into the market, which pushes the price down further and triggers the next margin call. High pledge plus a falling price is the configuration where this compounds.
Caveats
Pledge is not evidence of wrongdoing. A stable pledge against a cash-generating business is a different situation from a rising pledge against a falling price, and screening on the level alone will exclude perfectly sound companies.
The Regulation 31 filing requirement does not apply where the encumbrance is undertaken in a depository, so the event stream is not a complete census of encumbrance. The quarterly shareholding pattern remains the fuller picture.
Both sources are lagged. Event filings allow seven working days; shareholding patterns arrive weeks after quarter end. A backtest that applies a pledge figure from the quarter-end date rather than the publication date is reading data that did not exist yet.