Why These Stocks Are Rising and Falling Today: IGIL, BBOX & REDINGTON Gain; KEI, GRSE, & M&MFIN Decline

Indian equity markets opened sharply lower on Thursday, October 22, with the Nifty 50 trading 0.90% down at 22,604 around 9:31 AM weighed down by rising tensions in the Middle East and a fresh spike in crude oil prices. Brent crude jumped above $111 a barrel after fresh strikes in Saudi Arabia raised fears of more disruption to global oil supplies. Higher oil prices raised concerns over India's import bill, inflation and corporate earnings, triggering selling pressure in most sectors. Midcap and smallcap stocks saw sharp falls as broader markets also remained under pressure.

On the institutional front, foreign institutional investors (FIIs) turned net buyers on Wednesday, October 21, purchasing equities worth approximately ₹1,022 crore, while domestic institutional investors (DIIs) bought shares worth around ₹1,614 crore. Meanwhile, Jio Platforms' ₹30,213 crore IPO was fully subscribed within two hours of opening on Wednesday, receiving 3.16 times subscription by the end of the first day, with strong demand from institutional investors. The issue remains open until October 23. Investors will closely track crude oil prices, geopolitical developments, institutional activity and ongoing Q2 corporate earnings for further market direction.

Amidst this backdrop, here are the top gainers and losers in the Nifty 500 index.

Top Gainers for October 22: IGIL, BBOX & REDINGTON Gain Up to 10.0%

International Gemological Institute Ltd Price Jumps 10.0%

International Gemological Institute Ltd is among the top gainers in the Nifty 500 today and is trading at ₹353.20 at 9:31 am, gaining 10.0% from its previous close on NSE, following strong Q2 FY27 results announced on Wednesday. The company reported a 43% year-on-year rise in consolidated net profit to ₹185.84 crore, while revenue from operations increased 31% to ₹398.02 crore. EBITDA grew 39% to approximately ₹244.5 crore, supported by higher certification volumes and demand for lab-grown diamonds and coloured gemstones. The company issued 4.35 million certification reports during the quarter, up 26% year-on-year. Strong earnings and improved operating performance appear to have supported investor sentiment.
Trading volumes stood at 46.5 lakh, compared with the 30-day average volume of 6.8 lakh shares.

Black Box Ltd Share Price Rises Over 2.3%

Black Box Ltd is witnessing strong buying interest, with the stock gaining 2.3% to ₹917.55 on Thursday, October 22, at 9:31 am, purely due to structural sector tailwinds, tracking a broader rally and positive momentum across Indian IT and digital infrastructure stocks.

Trading volumes stood at 3.6 lakh shares, compared with the 30-day average volume of 10.0 lakh shares.

Redington Ltd  Share gains 2.2%

At 9:31 am, the Redington Ltd share price was trading at ₹369.50, up by 2.2% from its previous close on the NSE, recovering after a 2.56% decline in the previous trading session. Investor interest may be supported by the company's expanding technology distribution business, particularly amid supply constraints in the global memory and storage market.
Trading volumes stood at 17.6 lakh shares, compared with the 30-day average volume of 49.4 lakh shares.

Top Losers for October 22:KEI, GRSE, & M&MFIN Fall Up to 7.8%

KEI Industries Ltd Share Price Falls 7.8%

KEI Industries Ltd share price was trading at ₹3,899.70 down 7.8% from its previous close on the NSE at 9:31 am, following its Q2 FY27 financial results announced on Wednesday. The company reported a 29% year-on-year rise in consolidated net profit to ₹262.45 crore, while revenue increased 37.3% to ₹3,800.93 crore. However, net profit fell 4.3% compared with the previous quarter. Despite strong annual revenue growth, sequential weakness in profitability and pressure on operating margins appear to have weighed on investor sentiment.

Trading volumes stood at 16.1 lakh shares, compared with the 30-day average volume of 27.2 lakh shares.

Garden Reach Shipbuilders & Engineers Ltd Share Price Declines 6.5%

Garden Reach Shipbuilders & Engineers Ltd. shares saw selling pressure on Thursday, October 22 with the stock trading at ₹1,892.10 around 9:31 am, hitting a fresh 52-week low and extending their recent decline. The stock had already fallen 2.96% in the previous trading session, reflecting continued weakness. The decline comes amid cautious investor sentiment towards defence stocks, while concerns over near-term earnings performance and project execution may also be weighing on the counter.

Trading volumes stood at 7.6 lakh shares, compared with the 30-day average volume of 3.7 lakh shares.

Mahindra & Mahindra Financial Services Ltd Share Price Drops 6.4%

Mahindra & Mahindra Financial Services Ltd share faced selling pressure on Thursday, October 22, and was trading at ₹278.30, down 6.4% from its previous close on the NSE, following its Q2 FY27 results announced on Wednesday. The company posted a consolidated net profit of ₹910.73 crore, a healthy growth on a year-on-year basis, but profit slipped 1.81% on a quarter-on-quarter basis. However, investor sentiment was weighed down by rising borrowing costs amid high crude oil prices and inflationary pressures in spite of improved earnings. The prospect of higher interest rates also stoked concerns about future lending margins, contributing to the decline.

Trading volumes stood at 54.5 lakh shares, compared with the 30-day average volume of 19.7 lakh shares.