NiSource Share Price Falls 12% Amidst Mixed Valuation Signals

NiSource Inc. shares have declined by 12.77% over the past 90 days, pushing the stock price to $41.41. This recent selloff has created a significant discount relative to certain analyst targets, yet the company’s long-term total shareholder return remains strong, with gains of 64.30% over three years and 102.73% over five years. The disparity between the short-term price action and the durable multi-year trajectory has prompted a re-evaluation of the utility's current valuation.

In its September 2026 Investor Deck, NiSource outlined its regulated profile and capital plans, emphasizing a base capital expenditure program of $19.4 billion plus over $2 billion in incremental projects. The company projects this investment to drive annual earnings per share growth of 6% to 8%. However, conflicting valuation models now present investors with mixed signals regarding whether the current share price reflects undervaluation or overvaluation.

Earnings Growth Supports Higher Valuation

The most followed narrative on Simply Wall St positions NiSource as 17.2% undervalued, anchoring fair value at $50.03. This estimate relies on the company’s visibility into multi-year, rate-based capital spending. By committing to a $19.4 billion base plan, NiSource secures a predictable revenue stream that supports the projected 6% to 8% annual EPS growth. The model assumes that steady earnings expansion and firmer margins justify a valuation multiple typically reserved for faster-growing utilities.

This optimistic view depends on the successful execution of heavy gas infrastructure spending. The potential for the narrative to break exists if key rate approvals slip, which would squeeze future returns, or if rapid electrification shifts alter the demand landscape. The $50.03 fair value figure is thus contingent on maintaining the expected compound growth in regulated revenue without significant regulatory or technological headwinds.

Cash Flow Model Suggests Overvaluation

Conversely, a discounted cash flow analysis presents a more conservative outlook. This model estimates NiSource's fair value at $36.58 per share based on future cash flows. This figure sits below the current market price of $41.41, indicating that the stock may be overvalued when viewed through a cash-flow lens. The divergence between the earnings-based estimate of $50.03 and the cash-flow-based estimate of $36.58 highlights the sensitivity of valuation to different underlying assumptions about the utility's financial durability.

Investors face a choice between trusting the earnings growth narrative or prioritizing the stricter cash flow metrics. The cash flow model implies that the current market price already incorporates expectations that may not be fully supported by the company's actual cash generation capabilities. This discrepancy forces a critical assessment of which financial metric better represents the true economic value of NiSource's regulated assets.

Regulatory Risks Impact Investment Thesis

The core risk to NiSource's investment case lies in the regulatory environment. As a regulated utility, the company's returns are heavily dependent on rate approvals. Any delay or reduction in these approvals could undermine the projected 6% to 8% EPS growth. Additionally, the shift toward electrification poses a structural risk to the heavy gas infrastructure spending that underpins the current capital plan.

NiSource's strategy relies on a stable regulatory framework to ensure the recovery of its $19.4 billion capital expenditure. If the market's caution regarding the utility's outlook is well-placed, the recent 12.77% price drop may reflect a rational adjustment rather than an opportunity. Conversely, if the regulatory risks are overstated, the current discount to the $50.03 fair value estimate may represent a compelling entry point for long-term investors.