Five years ago, Sterling Infrastructure $STRL shares were trading around $21.20 each. Today, it's closed at $319.16—a remarkable 1,356% rise that comes from its strong work in heavy civil, residential, and specialty services, riding the wave of U.S. infrastructure spending and construction demand. The chart shows steady progress from 2022 lows, with real acceleration in 2024-2025, and after-hours at $320.00. That 52-week high of $419.14 stands as the recent top mark.

In simple terms, the compound annual growth rate (CAGR) is 71.78%. That's the average yearly lift—calculated by raising the total growth factor to the 1/5 power and subtracting 1. It means growing your money by over 70% each year, on average.

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Dollar-cost averaging (DCA) lays the foundation: Invest $500 every month for five years, totaling $30,000. This buys more shares on dips and fewer on peaks, keeping your average cost balanced. Projecting forward at the same historical pace, with a monthly growth rate of about 4.62% from $319.16, your shares stack up steadily.

After 60 months, your total could reach $158,998. That's a gain of $128,998—a 430% return on your investment. The early buys get the deepest compounding support, while later ones still add to the height.

This is based on the past, which isn't a guarantee ahead—infrastructure can slow with funding or economic changes, but a P/E ratio of 31.26 reflects solid expectations.

With that 52-week high of $419.14 in view and a $9.80B market cap, STRL has a strong footing. If DCA's your reliable blueprint, it could turn your $500 habit into a lasting structure by 2031.

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