New Delhi, July 25 -- Indian Energy Exchange, Newgen Software Technologies, Reliance Power, and PCBL Chemical are among the small-cap stocks that have seen their share prices decline sharply so far this week, amid weak domestic cues, a tepid start to the June quarter earnings season, and persistent selling by overseas investors.

Overall, 19 constituents of the Nifty Smallcap 100 index have fallen between 5% and 30% this week, with Indian Energy Exchange (IEX) shares topping the list, having lost 30% of their value. If not for a 9% rebound in today's session, the losses would have been even steeper.

The stock has been on a downward trend since July 16, with the decline accelerating in the previous session when it plunged 29.6%, its worst...