Supreme Court Tariff Ruling Triggers a New Wave of Uncertainty
In early March 2026, the U.S. Supreme Court issued a pivotal ruling on tariff authority — and paradoxically, it made planning harder rather than easier for small and medium-sized businesses (SMBs). Barry Kukkuk, co-founder and CTO of supply chain software firm Netstock, described the mood precisely: “It’s almost like there’s more uncertainty now that this ruling has come through than what there was three days ago.” The Court struck down certain tariffs levied under emergency powers, yet simultaneously opened the door to new tariff mechanisms — including Section 122, which enables temporary duties of up to 15% on any country for up to 150 days, and the dormant Section 338 from the 1930s Tariff Act, which could theoretically authorize duties as high as 50% or outright embargoes on goods deemed discriminatory against U.S. commerce.
For SMBs that account for 99% of all U.S. firms and approximately 44% of U.S. GDP, this legal landscape is not just an abstraction — it translates directly into real planning paralysis. Companies that had established supplier contracts, inventory cadences, and cash flow forecasts now face the prospect of recalibrating everything. The procedural gridlock surrounding potential tariff refunds for IEEPA duties paid in recent years adds another layer: “Is anyone going to get refunded, and how is that even going to work?” Kukkuk asked. “How many years is that going to take to unroll all of that? It’s just a mess.”
What makes 2026 different from prior shocks is the structural nature of the uncertainty. The pandemic in 2020 caused physical disruptions — factory shutdowns, vessel diversions, port closures. The Suez Canal blockage in 2021 was a discrete event with a finite resolution. But rule-layer volatility — where the policy framework itself becomes unpredictable — requires a fundamentally different resilience posture. Kukkuk captured this shift: “Since 2020, it’s just been one after the next. Disruptions are here to stay.” That framing transforms supply chain resilience from a reactive crisis management capability into a permanent operating discipline.
“If you still think you can get away with a cash register and a bit of Excel, it’s not going to work.” — Jefferson Barr, SVP Global Marketing, Netstock
SMBs: Half the Economy, Still Running on Spreadsheets
The structural vulnerability of the SMB cohort is stark. Despite contributing 44% of U.S. GDP and representing 99% of American businesses, approximately 8 in 10 (roughly 80%) of SMBs continue to use spreadsheets as their primary supply chain planning tool, according to reporting by FreightWaves. That figure is not merely a technology gap — it is a decision-making liability. When a tariff policy change requires a company to re-evaluate sourcing across dozens of SKUs within 72 hours, a manually updated Excel model cannot support cross-functional coordination at the required speed or accuracy. Purchasing must revise bill-of-materials inputs, logistics must reprice freight quotes, and finance must recalculate landed costs — all in parallel, with real-time data dependencies that spreadsheets structurally cannot satisfy.
Jefferson Barr, Netstock’s Senior Vice President of Global Marketing, described the market dynamic bluntly: “When there’s uncertainty, your spreadsheet struggles to model that uncertainty. You don’t really know where things can go.” This observation points to a deeper issue than tool selection — it reflects a planning philosophy gap. Spreadsheets are fundamentally backward-looking instruments built on historical averages. They excel at reporting what happened, but fail when tasked with probabilistic modeling of what could happen under multiple policy scenarios. For SMBs navigating simultaneous tariff threats under Section 122 and Section 338, three-supplier diversification scenarios across Vietnam, Mexico and Singapore, and potential refund timelines for past IEEPA duties, the spreadsheet’s static architecture is simply unfit for purpose.
The commercial data validates this assessment. Netstock reported 29% year-over-year revenue growth in 2025 and added 80 net new customers in December alone — a company record. Barr noted that the firm’s customers “were really agile” in navigating recent disruptions. This growth trajectory is not coincidental: it maps directly to the acceleration of supply chain volatility. When tariff uncertainty threatens company survival, investment in AI-powered demand planning and inventory optimization tools transitions from an efficiency play to a risk management imperative.
Structured Volatility: From Exception to Operating Norm
The concept of “structured volatility” — articulated by Barr as a defining characteristic of the current macroeconomic environment — represents a paradigm shift in how supply chain resilience must be architected. Rather than designing systems to absorb occasional disruptions and return to a stable baseline, organizations now need infrastructure that continuously absorbs and adapts to an unending sequence of shocks. The practical implications are significant. Inventory strategy that relies on safety stock buffers calibrated to historical demand variance will systematically underperform when policy-driven demand swings are superimposed on seasonal patterns. Safety stock sized for a stable tariff environment becomes stranded capital when tariff rates can shift by 15-50 percentage points with 150 days’ notice.
One of the more revealing behavioral observations from FreightWaves’ reporting is that SMBs are largely resisting panic buying despite the escalating uncertainty. Kukkuk noted: “Our customers are not panic buying. They understand that it could go this way or it could go that way. Either way, I need to buy this much at a time.” This disciplined posture reflects a learning effect from prior disruptions — companies that panic-bought in 2020 and 2021 frequently ended up with overvalued inventory and elevated carrying costs as conditions normalized. The measured approach now reflects a more sophisticated risk-return calculus: rather than hedging with inventory, leading SMBs are hedging with decision-making speed and data quality.
The cost absorption dynamic adds another dimension. Rather than passing tariff costs to end consumers — which would risk losing price-sensitive customers — many SMBs absorbed the hit themselves to preserve service levels and customer relationships. Barr noted that companies “kind of took a hit on a couple of different fronts last year to weather the storm and keep customer satisfaction high.” This strategic decision preserves revenue but compresses margins, which in turn intensifies the ROI pressure on operational efficiency. Every basis point of margin recovered through better inventory turns, reduced stockouts, or faster supplier switching becomes more valuable in a high-cost tariff environment.
Supplier Diversification: From Tactical Response to Permanent Architecture
One of the clearest structural consequences of repeated tariff disruptions is the acceleration of supplier diversification away from concentrated sourcing. FreightWaves reporting confirms that businesses which previously relied heavily on Chinese manufacturing are increasingly exploring and building alternative supply bases in Vietnam, Singapore, and Mexico. Kukkuk offered a notably durable assessment of this trend: “The diversification has started and I think it will carry on forever. It’s something that’s been woken up with U.S. importers, and they will always now try to have a diverse supply chain so that they don’t get stuck with the next thing.”
The strategic logic is straightforward: a geographically diversified supply base reduces the blast radius of any single tariff action. If Section 338 duties were imposed on Vietnam, a company with production spread across Vietnam, Mexico, and domestic U.S. facilities can rapidly reweight its sourcing mix without a wholesale supply disruption. This optionality — which Barr’s team describes in terms of “appetite for moving away from concentrated sourcing” — has grown steadily over the past year in Netstock’s customer base. The data from FreightWaves also shows a 4% year-over-year increase in average on-hand inventory levels as shippers consolidated shipments and built buffers against tariff threats in the first half of 2025.
However, diversification carries its own complexity premium. Shifting suppliers requires qualification audits, ramp-up time for new production lines, and often significant tooling or minimum order volume commitments. In some industries, viable alternatives to Chinese manufacturing remain limited by capability constraints. Kukkuk acknowledged this reality plainly: “Still, shifting suppliers is easier said than done. In some industries, viable alternatives to China remain limited.” For these sectors, the strategic response must therefore focus more heavily on the resilience of demand planning and inventory positioning rather than on the diversification of supply itself.
Technology as the Resilience Infrastructure of the SMB Era
The convergence of tariff policy volatility, geopolitical disruption, and labor market pressures has elevated supply chain software from an operational tool to a strategic survival asset for SMBs. Jefferson Barr’s framing is categorical: the notion that a business can manage today’s supply chain complexity with a cash register and Excel “is not going to work.” The technology adoption data supports this view. Netstock’s 29% growth in 2025 and record 80 net new customers in December reflect a market increasingly willing to invest in tools that provide data-driven certainty amid policy uncertainty.
The key value proposition of AI-enhanced demand planning and inventory optimization tools in this environment is not cost reduction per se — it is decision acceleration. When a tariff announcement drops, companies using AI platforms can immediately query their SKU portfolio for exposure, model alternative sourcing scenarios, and generate recommended action plans. Companies still operating on spreadsheets face a multi-day process of manual data assembly, cross-functional coordination, and scenario building — during which tariff windows may open or close, supplier capacities may be allocated to competitors, and freight rates may move significantly.
Kukkuk expressed measured optimism about SMBs’ preparedness heading into the next tariff wave: “It won’t be a surprise. It’ll be uncomfortable. But they’ll say, ‘Okay, we now understand how to deal with changes in tariffs.'” This institutional memory — built through repeated exposure to supply chain shocks since 2020 — combined with increasingly capable technology infrastructure, positions the most adaptive SMBs to convert the chaos of structured volatility into competitive advantage. For those still relying on spreadsheets as their primary planning tool, the 2026 tariff environment represents an existential pressure test that Excel alone cannot pass.
Strategic Implications: Building Resilience in the Rules-Volatility Era
The 2026 tariff environment encapsulates a broader truth about supply chain management in the current decade: the external operating environment has become structurally less predictable, not temporarily more uncertain. SMBs that internalize this reality and redesign their planning systems accordingly will develop a durable competitive advantage. Those that treat each tariff shock as an anomaly to be endured — rather than a signal to be acted upon — will find themselves perpetually in reactive mode, absorbing costs and losing agility. The convergence of Supreme Court tariff rulings, potential Section 122 and 338 applications, ongoing geopolitical tensions, and the permanent reorientation of supply bases creates a compounding pressure environment that rewards preparation over improvisation.
Three strategic imperatives emerge from FreightWaves’ reporting. First, supply chain digitalization is no longer optional for SMBs operating in tariff-volatile markets — the planning complexity introduced by multi-jurisdiction sourcing, policy-driven cost swings, and rapid geopolitical changes has simply exceeded the capacity of spreadsheet-based systems. Second, supplier diversification should be treated as a structural investment rather than a reactive measure: the companies that built Vietnam and Mexico supply bases before the 2026 tariff escalation are navigating the current environment with significantly more optionality than those still concentrating risk in single-country sourcing. Third, organizational resilience — the ability to absorb uncertainty without decision paralysis — requires deliberate cultivation, including the training of procurement and logistics teams to operate under ambiguity using data-driven decision frameworks.
The market signal is clear. Netstock’s record growth metrics in the highest-volatility quarter of 2025 indicate that supply chain disruption, rather than suppressing technology investment, is accelerating it. The 80% of SMBs still relying on spreadsheets represent both the scale of the gap and the magnitude of the opportunity — for supply chain software providers, for consulting firms offering resilience frameworks, and for the businesses themselves. In an era of structured volatility, the supply chain has become the primary arena of competitive differentiation. Those who invest in making it smarter, faster, and more adaptive will define the next generation of market leaders.
Related Reading
- Tariff Volatility and the Irreversible Regionalization of Global Supply Chains in 2026
- 80%中小企业仍用电子表格应对关税冲击：2026年供应链韧性的生死抉择（中文版）
This article is AI-assisted and reviewed by the SCI.AI editorial team before publication.
Source: freightwaves.com
