India Inc.'s March-quarter earnings have largely exceeded market expectations, supported by stronger revenue growth, cost optimization measures, and resilience in select sectors such as defence, metals, and consumer durables. However, concerns remain over slowing earnings growth, rising input costs, and inflationary pressures that could weigh on corporate profitability in the coming quarters.Speaking to ET Now, Dhananjay Sinha from Systematix Group highlighted that while the quarter's performance was encouraging, analysts have become more cautious about future earnings growth."Yes, it is somewhat better than what the market was expecting. Though I would say that if we look at the broader context of the consensus estimate, we saw something somewhat different. There were more downgrades in terms of the overall expectations for earnings going forward. What we are presenting here is the performance versus the expectation for the quarter. But if we look at the forward earnings, it does appear that there are more downgrades than upgrades that have happened during the quarter. So, the earnings expectations have moderated somewhat. I would say that versus 13%-15% growth next year, people are now looking at roughly 10%-12% growth. That is the follow-up that analysts have actually seen after the results."Revenue Growth Improves on a Low BaseSinha noted that aggregate revenue growth has improved significantly compared with last year, aided partly by a favorable base effect."With respect to this particular quarter, there has been a certain amount of uptick as far as the overall topline growth is concerned. Broadly, I would say the overall topline growth, on a net sales basis, is roughly about 9% to 10%, and this is coming from a very modest base. Last year, for Nifty, for instance, the topline growth was in the region of 3% to 4%. So, there is a base effect that is playing up."While revenues improved, companies continued to face pressure from higher raw material costs. However, lower employee costs and stable borrowing expenses helped protect margins."The other thing that we have noticed on an aggregate basis is that the raw material costs have continued to remain on the higher side. If you look at the total expenditure on raw material, it has been roughly about 8% to 9%; there is some uptick, especially for the Nifty companies.So, there is a certain pressure there. But what we found also is that there has been a certain amount of savings by way of deceleration in spending on compensation and salaries, which has come down to 4% to 5%. Also, there is significant moderation as far as the interest outgo is concerned, so that is actually contracting or has remained flat over the last year.So, there is a certain amount of optimisation that various companies have actually adhered to in order to report a certain profit."Defence and Metals Continue to ShineAmong sectors, defence and metals emerged as standout performers, benefiting from favorable macroeconomic trends and policy support.Sinha believes the defence sector, in particular, could enjoy a multi-year growth runway as geopolitical tensions drive increased military spending worldwide."However, I would say that with respect to defence, we think that there is a likelihood of a fairly strong tailwind for several years now because we know that global spending on defence has been rising.The last report that I saw showed that the overall global spending on defence has gone up to almost $2.9 trillion or something. So, there is a continuous rise. We think that over the next few years, the overall growth in nominal terms would be in the region of 8% to 9% or more.So, there is a tailwind as far as the overall defence spending is concerned, largely coming from geopolitical developments that are happening. We have seen that whenever global disturbances of such kind happen, as we are seeing in the Middle East, it is followed by significant allocations by countries to increase their defence wherewithal. So, that is something that might happen."While metals could continue to benefit from rising commodity prices, Sinha expects broader earnings growth to moderate as inflation pushes up production costs."At a broader level, I would say we are expecting moderation as far as expected earnings are concerned."Inflation Could Squeeze MarginsA key concern for corporate India is the rise in inflation and input costs. According to Sinha, wholesale prices are increasing faster than producer prices, creating the risk of margin compression."We think that because of the rising energy prices and metal prices, the overall material costs will go up, and we are seeing inflationary pressure coming up.If you look at the WPI, it has gone up to almost 8.4%, and CPI is also rising, currently about 3.5% or thereabouts. So clearly, that basically shows that the raw material costs are rising faster than the producer prices. So, there is a likelihood of margin compression going forward."Consumer Demand Remains UnevenDespite strong performances from some consumption-oriented companies, Sinha remains cautious on the broader consumer story. Ground-level channel checks indicate that demand in traditional brick-and-mortar segments remains subdued."As far as the consumer space is concerned, what we are gathering from the ground level—we have done channel checks, for instance, in the value retail segment, tobacco, and other segments as well. What we are finding is that the overall sales growth for the core brick-and-mortar consumer space is actually fairly slow.Companies are able to show a certain amount of strength in overall sales largely coming from expansion in stores, etc."He also pointed to signs of downtrading in some categories as consumers grapple with inflation and slower income growth."In tobacco, for instance, there has been an increase in prices and there is downtrading that is happening."Selectivity Key in Consumer StocksAccording to Sinha, investors should focus on companies with strong brands and competitive advantages rather than taking a broad-based approach to consumer stocks."Overall, what we find is that the big picture for the consumer space is that compensation growth has moderated to roughly about 4% to 5%, and it can actually moderate going forward as well. At the same time, you have rising inflation.So, it is quite likely that the spending power of consumer households might actually moderate, and that will impact the performance of consumer companies. The ability of consumer companies to pass on increasing costs is something that will need to be tested going forward.Our sense is that there is a certain amount of pressure that is happening out there."However, some companies continue to demonstrate resilience."Within the consumer space, we will need to look at companies that have a good moat with respect to their products. Nestlé, for instance, has been able to show significant strength as far as the overall volume and operating performance are concerned.So, there are select companies that are able to withstand the headwinds. We would rather be selective in the consumer space."Summer-Linked Categories May BenefitLooking ahead, weather-related trends could create pockets of opportunity within consumption."The other aspect is also the El Niño effect that is going to happen, and that is likely to have an impact on the rural economy. There is going to be a higher temperature as well, so ACs are a segment that can actually show somewhat better results. Also, I would say summer products might actually do well from a seasonal standpoint."Outlook: Strong Quarter, Softer Road AheadWhile fourth-quarter earnings provided some comfort to investors, the focus is increasingly shifting toward the sustainability of growth. Rising inflation, higher commodity prices, and slowing earnings upgrades suggest that corporate profitability may face greater challenges in the coming quarters. Against this backdrop, sectors with structural tailwinds such as defence, along with select companies possessing strong pricing power and competitive moats, are likely to remain in favor.