India Stock Market Today: What to Know Before Nifty, Sensex Open on 18 December 2025 — GIFT Nifty, RBI-Rupee Moves, Oil Jump, SEBI Changes, Stocks to Watch

Indian equities head into Thursday’s session (18 December 2025) with risk appetite still fragile after benchmarks logged a third straight decline on Wednesday. The setup is a tug-of-war between low volatility readings and heavy derivatives positioning on one hand, and currency stress, foreign outflows, and global uncertainty on the other.

Below is a comprehensive, pre-market guide to the biggest cues, key levels, and stock-specific triggers shaping the opening trade today—based on news, forecasts, and analyses published across 17–18 December 2025.

Where the market left off: Nifty and Sensex extend the losing streak

On Wednesday (17 December), Indian benchmarks ended marginally lower for the third consecutive session:

Sensex fell 120.21 points (−0.14%) to 84,559.65
Nifty 50 slipped 41.55 points (−0.16%) to 25,818.55 ^[1]

Market breadth stayed weak with declines outpacing advances on the NSE (about 2,498 shares down vs 1,326 up), reinforcing the “sell-on-rise” feel that has dominated the week. ^[2]

Sector snapshot (Wednesday close):

PSU Banks outperformed (up ~1.2%)
Media was the biggest drag (down ~2%)
Private Banks, Realty, Consumer Durables, FMCG, Healthcare also slipped (roughly 0.4–1%) ^[3]

Nifty movers to remember (Wednesday):

Top gainers: Shriram Finance, SBI, Eicher Motors, Hindalco, Tata Consumer
Top losers: Max Healthcare, SBI Life, HDFC Life, Trent, Apollo Hospitals ^[4]

The takeaway for Thursday: the index is not collapsing, but the repeated failure to sustain rebounds is keeping traders defensive—especially in the broader market, which has shown more strain than the large-caps. ^[5]

Early signal for the open: what GIFT Nifty is indicating

Pre-market cues suggest the opening could remain muted to mildly negative. GIFT Nifty futures (30-Dec-2025) were around 25,845.50, down 44.50 points (−0.17%), in the early hours of 18 December (timestamped shortly after midnight). ^[6]

Because GIFT Nifty can swing quickly as global markets move, treat this as a directional read, not a final print.

Global cues: Wall Street drops, oil rises, and rate uncertainty lingers

US stocks fell sharply overnight

US markets ended lower on Wednesday, with tech weakness weighing on sentiment:

S&P 500: −1.2% to 6,721.43
Dow: −0.5% to 47,885.97
Nasdaq: −1.8% to 22,693.32 ^[7]

That matters for India because persistent weakness in global risk assets typically pressures high-beta pockets(midcaps/smallcaps, momentum names) and can keep FPI risk appetite cautious.

Crude oil bounced more than 1%—a key watch for India

Oil prices rose after geopolitical headlines, easing some fears about oversupply:

Brent settled at $59.68/bbl (up ~1.3%)
WTI settled at $55.94/bbl (up ~1.2%) ^[8]

For Indian markets, a sustained rise in crude can revive concerns around import costs, inflation expectations, and the rupee, even if equity indices don’t react immediately at the open.

The macro overhang: rates, the Fed path, and global liquidity

Market commentary late Wednesday highlighted that investors are still trying to gauge the interest-rate trajectory amid mixed signals, while global cues remain uneven. ^[9]

The rupee is back in focus: RBI intervention vs trade anxiety

Currency moves are a bigger-than-usual variable for Thursday’s opening tone.

Reuters reported the Reserve Bank of India intervened aggressively on Wednesday after the rupee hit record lows for four straight sessions, with the rupee rallying sharply in early trade (to around 90.25 after opening near 91.07, per the report). ^[10]
In a separate Reuters analysis, the rupee’s 2025 weakness was tied to a prolonged U.S.–India trade impasse and heavy foreign outflows, noting the currency has been among the worst performers in Asia this year. ^[11]

Why equity traders care:

A volatile rupee can hit sentiment in import-heavy sectors (oil marketing, aviation, chemicals) while offering some support to exporters (IT, pharma)—but the bigger impact is often through foreign flows and risk perception.
RBI presence can calm the market temporarily, but the narrative around trade friction and tariffs keeps the rupee sensitive to headlines. ^[12]

Domestic policy and regulation: SEBI’s decisions may shape financial stocks

A major domestic development from Wednesday was the SEBI board meeting outcome.

Reuters reported SEBI approved:

Changes to mutual fund fee structures to improve transparency and mandate clearer disclosure of cost components
A revised approach to brokerage limits paid by mutual funds (after industry feedback)
Steps affecting market structure, including reduced compliance requirements for small brokers and defining newer practices like algorithmic/proprietary trading
Changes in lock-in requirements for existing shareholders in public issues (with certain exclusions)
Measures aimed at boosting retail participation in debt issues
And SEBI deferred a decision on a conflicts-of-interest framework for senior officials. ^[13]

Market relevance for Thursday:
These decisions can influence sentiment around asset managers, capital market intermediaries, and platform businesses, and may also feed into how investors price the longer-term growth of India’s financialization theme.

Big policy headline: insurance sector foreign investment cap raised

Another key trigger for financials and insurers: Reuters reported lawmakers approved raising the foreign investment cap in the insurance sector to 100%. ^[14]

That’s a structural story, but it can still impact near-term price action in listed insurers and insurance-adjacent financial names if investors reposition on expectations of greater capital access and competitive intensity.

Stocks to watch today (18 December 2025): deals, orders, fund-raising, and regulatory approvals

Here are the most actionable company-specific triggers expected to dominate stock-specific chatter at the open:

IT and engineering

HCL Technologies: Selected as a strategic partner by ASN Bank (Netherlands) under a multi-year agreement to support enterprise applications and service streamlining. ^[15]
Cyient: Subsidiary Cyient Semiconductors Singapore signed a deal to acquire >65% stake in Kinetic Technologies for $93 million; also saw a senior appointment update (Group COO effective Dec 22). ^[16]
Titagarh Rail Systems: Won its first safety & signalling order from Indian Railways worth ₹273.24 crore(includes RBMV design/manufacture/supply/testing/commissioning and support). ^[17]
GE Vernova T&D India: Received a Power Grid award for refurbishment/upgrade work on the 2×500 MW HVDC Chandrapur back-to-back link, including valves and control/protection upgrades. ^[18]

Waste management and infrastructure

Antony Waste Handling: Subsidiary won two contracts worth ₹1,330 crore for MSW collection and transportation in Mumbai (BMC). ^[19]
Denta Water and Infra Solutions: Secured four water infrastructure projects worth ₹106+ crore in Karnataka. ^[20]

Power and renewables

GMR Power and Urban Infra: Board approved equity issuance (₹800 crore) and convertible warrants (₹400 crore) at an issue price of ₹120.88. ^[21]
KP Energy: KP Group signed an MoU with the Government of Botswana covering renewable generation, storage, and transmission projects, with indicated capital investment of about $4 billion (~₹36,000 crore). ^[22]

PSU banking and divestment flow

Indian Overseas Bank (IOB): Government decided to exercise an oversubscription option in its offer-for-sale, taking the total OFS size up to 46.12 crore shares (2.395% stake) for the 18 December leg. ^[23]

Payments/fintech regulatory update

One 97 Communications (Paytm): RBI authorised Paytm Payments Services to operate as a Payment Aggregator for physical (offline) payments and cross-border transactions, in addition to online PA authorisation granted earlier. ^[24]

Corporate actions and block deals (sentiment movers)

Akzo Nobel India: Promoter sold ~8.99% stake; other investors participated in the block, per the report. ^[25]
Ola Electric Mobility: Founder Bhavish Aggarwal sold 0.95% stake (4.19 crore shares) in the latest sale, following a prior session stake sale. ^[26]
Syrma SGS Technology: Acquired 60% stake in Elcome for ₹235 crore (mix of primary/secondary). ^[27]

Technical outlook for Nifty and Bank Nifty: key levels, options positioning, and volatility

Nifty 50: support zone is getting tested

Multiple market reads published late Wednesday converge on a key near-term area:

Immediate support: 25,750–25,700 (a breakdown risks 25,500)
Resistance: 25,950–26,050 (a sustained move above can open 26,300) ^[28]
Pivot levels cited: Resistance 25,900 / 25,938 / 25,998 and Support 25,779 / 25,741 / 25,680 ^[29]

Moneycontrol’s trading-plan note adds that Nifty is hovering near the 25,750–25,700 band (linked with moving-average supports), with repeated tests raising questions about how long the floor can hold if global cues worsen. ^[30]

Bank Nifty: watch 58,800 closely

Bank Nifty ended Wednesday near 58,927, and key levels flagged for Thursday include:

If 58,800 breaks convincingly: 58,600–58,500, then 58,300
On the upside: 59,550 is a key level that could negate the “lower high–lower low” structure ^[31]

Options data: where the market is “pinned”

From the derivatives snapshot published late Wednesday:

Nifty Calls: 26,000 strike held the highest call OI (a major resistance zone) ^[32]
Nifty Puts: 25,500 strike held the highest put OI (support reference), followed by 25,800 ^[33]

For Bank Nifty, the options positioning around the 59,500 / 60,000 area was highlighted as important for resistance/levels. ^[34]

Put-Call Ratio and India VIX: calm on the surface, but don’t ignore tail risk

Nifty PCR declined to about 0.77 (a softer reading that can reflect cautious sentiment). ^[35]
India VIX fell to 9.84, described as the lowest closing level in the cited update—low volatility can persist, but it can also precede sharp moves if a trigger hits. ^[36]

F&O ban list

Bandhan Bank remained in the F&O ban list (no new additions/removals reported in that update). ^[37]

The “one-screen” checklist before the bell

If you’re trying to compress everything into a practical pre-open dashboard, here are the catalysts most likely to decide direction in the first hour:

Does the Nifty hold 25,750–25,700? A break can quickly shift focus to 25,500. ^[38]
Rupee behaviour after RBI’s intervention: stability can ease pressure; renewed weakness can reignite risk-off. ^[39]
Crude after Wednesday’s jump: higher oil can feed into macro/FX concerns. ^[40]
Regulatory and policy repricing: SEBI’s mutual-fund fee and market-structure changes, plus the insurance FDI cap decision, can move financials. ^[41]
Stock-specific momentum: Paytm’s RBI authorisation update, Cyient’s acquisition, and IOB’s OFS sizing are prime “headline trades.” ^[42]

Bottom line: what kind of session is setting up?

With global equities weaker, oil firmer, and the rupee still headline-sensitive, Thursday’s open looks primed for a cautious start—even though VIX is unusually low and derivatives positioning suggests the market could stay range-bound until a catalyst forces a break. ^[43]

For traders, the day’s character may be decided by whether Nifty can defend the 25,700 zone early. For investors, the bigger story remains the intersection of policy/regulatory shifts (SEBI, insurance FDI) and macro risk (FX + global rates)—themes that can take longer to play out than a single session. ^[44]

Disclaimer: This article is for information only and is not investment advice.

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