The capital market regulator has told credit rating agencies — some of which were blindsided by the aura and size of IL&FS — to review borrowers as soon as their bond prices crash, and even place such securities on ‘rating watch’ if prices continue to languish. Baffled by the rapid downgrades of IL&FS debt paper — from triple-A to ‘D’ (or, default) in less than two months — Sebi wants rating agencies to take cues from the market in evaluating bond issuers. The strategy to track widening bond spreads — the difference between a corporate bond yield and that of a government bond of similar maturity — was emphasised by Sebi officials at a recent meeting with large rating agencies, two persons familiar with the development told ET. The move assumes significance with the financial market currently displaying a sudden risk aversion to debt securities of businesses like non-banking finance companies whose importance and valuation had risen in the last two years as banks shirked l