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HomeBlog$10,000 in Tesla When It Joined the S&P 50…

$10,000 in Tesla When It Joined the S&P 500 Would Be About $15,700 Today

A historical analysis shows how a $10,000 investment in Tesla since its S&P 500 inclusion would have grown, compared to the broader index performance. A lesson on volatility and diversification for traders.

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Team Onyx · Trading analysts · years trading and coaching traders
September 12, 2026 · 1 min read
Historical chart of Tesla vs S&P 500 performance comparison since index inclusion

Tesla vs. the Index: A Historical Comparison

According to Yahoo Finance, a $10,000 investment in Tesla since its S&P 500 inclusion would have grown to approximately $15,700 today. While this represents significant growth, the analysis highlights a key point: a diversified S&P 500 index fund would have delivered better returns.

Why This Matters for Traders

This comparison is not a recommendation on what to buy, but a lesson on volatility and concentration risk:

The Educational Takeaway

This historical case reminds us that diversification reduces volatility but also caps extreme gains. There's no "better" or "worse"—just different risk profiles. On high-impact news days (like Tesla earnings), volatility spikes: that's when discipline and a clear risk plan separate sustainable traders from those who lose capital to emotion.

In Onyx Academy and with Guardian (our risk manager), you learn to respect daily loss limits and prepare for volatile sessions, whether you trade stocks, indices, or any asset class.

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Team Onyx
Trading analysts · years trading and coaching traders
We write about discipline, risk management and funded accounts, with years of experience trading and coaching traders.

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