Technology is the largest sector in the S&P 500, yet most investors screen it with the wrong tools. A P/E of 35 looks expensive next to a utility, but it can be cheap for a software business growing revenue 30% a year. To find quality tech names without overpaying, you need a screening approach built for the sector's economics rather than the generic value filters that work elsewhere.
Why Standard Value Filters Fail in Tech
If you screen the technology sector for a P/E under 15, you will mostly find struggling hardware vendors and legacy names in decline. The best software, semiconductor, and platform businesses rarely trade that cheap because the market correctly prices their growth and margins. Applying a blanket low-P/E filter screens out the winners and surfaces the value traps. Instead, anchor your tech screen on growth-adjusted valuation and profitability. A useful starting point: revenue growth above 15%, gross margin above 50%, and a PEG ratio under 2. The PEG ratio divides P/E by the earnings growth rate, so a stock at 30x earnings growing 25% has a PEG of 1.2 — reasonable. On DeltaScreener, layer these three filters together rather than relying on a single valuation cutoff that the sector will simply ignore. The goal is to find businesses that are growing fast enough to grow into their multiples.
Gross Margin Is the Quality Signal
Gross margin tells you whether a tech company sells software economics or hardware economics. Pure software firms routinely post gross margins of 70-85%, because shipping one more license costs almost nothing. Hardware and contract manufacturers run 20-40%. Semiconductors sit in between at 40-65%, depending on whether they design chips or just fabricate them. Screen for gross margin above 60% if you want capital-light, scalable businesses. Pair it with operating margin to confirm the company converts those gross profits into actual operating income rather than burning it all on sales and marketing. A software company with 80% gross margin but negative operating margin is spending its way to growth — sometimes fine, often a red flag. On DeltaScreener, sort your tech results by gross margin descending to instantly separate the software-quality names from the commodity hardware crowd, then read each business from the top down.
Don't Ignore the Balance Sheet
Tech is famous for cash-rich balance sheets, but the sector also hides heavily leveraged turnaround stories and acquisition-fueled rollups. Screen for a current ratio above 1.5 and net debt that is negative or low relative to EBITDA. The strongest tech franchises — the ones with pricing power — often hold more cash than debt, giving them firepower for buybacks, R&D, and downturn survival. A second balance sheet check is stock-based compensation as a percentage of revenue. Many software companies report healthy GAAP-adjusted numbers while quietly diluting shareholders 4-6% a year through equity grants. If you can access free cash flow per share over time, watch whether it grows alongside revenue or stalls because dilution eats the gains. A company growing revenue 25% but FCF per share only 5% is keeping most of the value for employees, not owners. That gap is one of the most overlooked warning signs in the entire sector.
Use the Rule of 40 for Software
For software-as-a-service and other recurring-revenue businesses, professional investors lean on the Rule of 40: revenue growth rate plus profit margin should exceed 40. A company growing 30% with a 15% free cash flow margin scores 45 — healthy. One growing 50% but burning 20% scores 30 — it is buying growth at an unsustainable cost. The rule elegantly balances the two levers that matter in software and flags businesses that are doing neither well. While DeltaScreener may not have a single Rule of 40 button, you can approximate it by screening for revenue growth above 20% and positive free cash flow margin, then filtering the results manually. This combination reliably surfaces durable compounders and weeds out the cash-incinerating growth stories that look exciting until funding tightens and the market stops rewarding growth at any price.
Match the Filters to the Sub-Sector
Technology is not one market — it is several with very different financial profiles, and a single screen rarely fits all of them. Consider tightening or loosening your filters by sub-sector. For application software, demand gross margins above 70% and a Rule of 40 score over 40. For semiconductors, accept gross margins of 45-60% but require strong free cash flow and watch the inventory cycle, since chip demand swings hard with the economy. For hardware and IT services, lean on free cash flow yield and reasonable EV/EBITDA rather than gross margin, which will never look software-like. Useful filters to keep in your toolkit include: revenue growth, gross and operating margin, PEG ratio, current ratio, net-debt-to-EBITDA, and free cash flow margin. Mixing and matching these for each sub-sector produces far cleaner results than one rigid template applied to the whole sector.
Build a Repeatable Tech Screen
Put it together into a screen you can run weekly: revenue growth above 15%, gross margin above 60%, PEG under 2, current ratio above 1.5, and positive free cash flow. That single filter set will cut the hundreds of names in the technology sector down to a focused list of profitable, growing, reasonably valued businesses. From there, dig into each company's revenue mix, customer concentration, and competitive moat before buying. Screening narrows the universe; judgment closes the deal. Head to deltascreener.com/screener, select the technology sector, and apply these filters to build your watchlist of quality tech stocks today.