Sure, let me simplify this for a 7-year-old:

Imagine you're at a big market. There are two shops there:

1. **BYD shop** (they make electric cars and other stuff)
- They have one car on display today.
- It's called BYD Han, which is like saying "Big Dragon" in Chinese.
- The price tag says $53,000.

2. **Tesla shop** (you might know them from cartoons or movies!)
- There are more Tesla cars because they're very popular.
- One of their cars, Model S, is like the big brother of BYD Han. It's faster and has more features.
- But it's also pricier at $94,900.

Now, imagine you have some money saved up to buy a new car for your family:

- If you choose **BYD**, you'll spend less money but won't get as many cool features.
- If you choose **Tesla**, you'll spend more money but get lots of fancy stuff and probably go faster.

That's basically what the big text is about. It's telling us where these two cars come from, how much they cost, and a little bit about their features. Read from source...

I've reviewed the text you provided and here are some possible points a critic might argue:

1. **Lack of Context**: The text starts discussing stocks (BYDDYF, TSLA) without any background information. Critics could argue that readers unfamiliar with these companies or their industries might be confused or lost.

2. **Bias**: Some critics might argue bias towards certain companies or sectors. For instance, the text only mentions positive aspects about BYDDYF and negative aspects about TSLA.

3. **Omission of Relevant Information**: The text doesn't provide any financial data, market trends, or competitive analysis that could help readers understand why these stocks are highlighted in this manner.

4. **Absence of Counterarguments**: Critics might point out the lack of balance in presenting viewpoints. By only presenting one side of the story (positive for BYDDYF, negative for TSLA), it could be seen as an attempt to sway or manipulate reader opinion rather than inform them.

5. **Lack of Transparency**: The text doesn't mention who wrote it, when it was written, or what qualifications the author has in finance or investing, which could raise questions about credibility and reliability.

6. **Emotional Language**: The use of emotional language (e.g., "skyrocketing", "plunged"), while it might make the content more engaging, could also be seen as an attempt to influence readers' feelings rather than their rational thinking.

7. **Irrational Argumentation**: Critics might argue that some statements are not supported by evidence or rely on logical fallacies (e.g., appealing to authority without citing credible sources).

8. **Plagiarism/Copyright Infringement**: If the content was copied from another source without proper attribution, critics could accuse it of plagiarism or copyright infringement.

9. **Lack of Update**: Stock markets fluctuate daily, so information can become outdated quickly. Critics might argue that the data provided here is not current and thus, not useful for decision-making purposes.

10. **Unclear Target Audience**: The text seems to be written for readers familiar with stock symbols like BYDDYF and TSLA and comfortable making investment decisions based on this type of information. However, it's unclear if the intended audience is casual investors, professionals, or somewhere in between.

These are general points that a critic might raise. Specific arguments could vary depending on the stance and perspective of the critic.

Neutral.

The article does not express a particular sentiment about the stocks of BYD Co Ltd (BYDDF) or Tesla Inc (TSLA). It simply presents market data and news that both companies are investing in Vietnam to expand their electric vehicle production. The text does not contain any descriptive words or phrases that suggest a positive, negative, bearish, or bullish sentiment towards these stocks.

Based on the provided financial data, here are comprehensive investment recommendations along with associated risks:

1. **Buy & Hold (Long-term)**:
- *Company*: BYD Company Limited (HKG: 1211)
- *Reason*: BYD is a leader in electric vehicle (EV) and battery production, two of the fastest-growing industries globally. Its diverse product portfolio and strong market position make it an attractive long-term investment.
- *Risks*:
- Dependence on EV market growth and technological advancements.
- Competition from established automakers and new EV startups.
- Regulatory changes affecting battery production and EV sales.

2. **Swing Trading (Short to Medium-term)**:
- *Company*: Tesla, Inc. (NASDAQ: TSLA)
- *Reason*: Tesla's volatile stock price movements present opportunities for swing traders to profit from its price fluctuations.
- *Risks*:
- High stock price volatility may lead to significant gains or losses within short timeframes.
- Market sentiment and news events can greatly impact Tesla's stock price.
- Competition in the EV market and challenges in scaling production.

3. **Short Selling (Medium-term)**:
- *Company*: Nikola Corporation (NASDAQ: NKLA)
- *Reason*: Nikola's business model is heavily reliant on partnerships, such as the recently ended one with General Motors. Uncertain revenue growth and execution risks may weigh on its stock price.
- *Risks*:
- Short selling carries high risk due to potentially unlimited losses if the stock price moves against the trader's position.
- Regulatory changes could impact Nikola's business operations.
- Investor sentiment can lead to short squeezes, pushing the stock price higher temporarily.

4. **Diversification (Long-term)**:
- *Investment*: Invesco QQQ Trust (NASDAQ: QQQ) along with Vanguard Total Market ETF (NYSEARCA: VTI)
- *Reason*: Diversify your portfolio by investing in a mix of growth-focused tech stocks (QQQ) and the broad US market (VTI), providing exposure to various sectors and reducing single-stock risk.
- *Risks*:
- Market downturns can lead to paper losses on both ETFs, though the overall impact should be lessened due to diversification.
- Changes in interest rates may affect ETF prices.

Before investing, make sure to:

- Conduct thorough research and understand the risks involved.
- Consider your risk tolerance, financial goals, and investment horizon.
- Diversify your portfolio to spread risk across multiple assets and sectors.