Been looking back at some interesting growth ETF plays from a few years ago and thought I'd share what stood out. The market really showed us something back in 2018-2019 when growth stocks took it on the chin, especially in Q4. But here's the thing - growth factors tend to come roaring back, and that's where aggressive etfs can make sense for risk-tolerant investors.

Let me walk through some of the funds that caught attention. IUSG from iShares is solid if you want broad exposure without getting crushed on fees - just 0.04% expense ratio. This one tracks 534 stocks across the S&P 900 Growth Index, so you're getting decent diversification. Microsoft and Amazon were the heaviest hitters, which makes sense given tech's dominance in growth strategies. The volatility sits around 12% three-year standard deviation, so it's not exactly tame but not wild either.

If you want something more aggressive etfs-focused, RPG from Invesco is worth considering. This fund gets pickier about what counts as "growth" - they're looking at sales growth, earnings momentum, that kind of thing. Only 104 stocks make the cut, but they cap any single position at 2.12% to avoid concentration risk. The tech weighting is lower at 22.5%, with healthcare and industrials picking up more slack.

Then there's RZG if you want to venture into small-cap territory. Small-caps are naturally more volatile, and when you layer on the growth factor, things get spicy. Over a three-year period it was 170 basis points more volatile than the broader small-cap index but actually outperformed by 240 basis points. That's the tradeoff with aggressive etfs - higher risk, but potentially higher reward. Average market cap sits around $2 billion, so we're talking real small-cap exposure here.

FTC from First Trust is the contrarian pick. More expensive at 0.61% and it underperformed traditional growth benchmarks over certain periods, but it uses an interesting AlphaDEX methodology that blends growth and value factors. Not for everyone, but worth understanding if you're building a more tactical approach.

Finally, NUMG from Nuveen if you care about ESG screening alongside your growth exposure. Only 82 stocks make their requirements, split heavily between industrials and tech. It's newer and smaller, but that's sometimes where you find the most interesting thematic plays.

The key takeaway with all these aggressive etfs is understanding your volatility tolerance. Growth investing requires patience through downturns, but the historical record suggests it pays off over time.