ASTI vs CSIQ

For growth investors, Canadian Solar Inc.

(CSIQ) is the stronger pick with -6. 6% revenue growth year-over-year, versus -100. 0% for Ascent Solar Technologies, Inc. Common Stock (ASTI). Analysts rate Canadian Solar Inc. (CSIQ) a "Buy" — based on 33 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

Over the past 5 years, Canadian Solar Inc.

(CSIQ) delivered a total return of -55. 4%, compared to -100. 0% for Ascent Solar Technologies, Inc. Common Stock (ASTI). Over 10 years, the gap is even starker: CSIQ returned +29. 8% versus ASTI's -100. 0%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Canadian Solar Inc.

(CSIQ) is the lower-risk stock at 2. 28β versus Ascent Solar Technologies, Inc. Common Stock's 4. 45β — meaning ASTI is approximately 95% more volatile than CSIQ relative to the S&P 500. On balance sheet safety, Ascent Solar Technologies, Inc. Common Stock (ASTI) carries a lower debt/equity ratio of 44% versus 180% for Canadian Solar Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Canadian Solar Inc.

(CSIQ) is pulling ahead at -6. 6% versus -100. 0% for Ascent Solar Technologies, Inc. Common Stock (ASTI). On earnings-per-share growth, the picture is similar: Ascent Solar Technologies, Inc. Common Stock grew EPS 70. 2% year-over-year, compared to -387. 0% for Canadian Solar Inc.. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Ascent Solar Technologies, Inc.

Common Stock (ASTI) is the more profitable company, earning 0. 0% net margin versus -1. 9% for Canadian Solar Inc. — meaning it keeps 0. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ASTI leads at 0. 0% versus -0. 5% for CSIQ. At the gross margin level — before operating expenses — CSIQ leads at 18. 3%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Canadian Solar Inc.

(CSIQ) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding. Ascent Solar Technologies, Inc. Common Stock (ASTI) carries a higher beta of 4. 45 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CSIQ: +29. 8%, ASTI: -100. 0%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Energy sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.