**Changes in Tesla's Operating Profit Margins, Affordability Concerns, and Full Self-Driving Software Developments Impact Stock Performance**

In recent times, Tesla, Inc. has seen a mix of fluctuations in its stock due to various pivotal factors including operating profit margins, vehicle affordability, and updates to its full self-driving (FSD) software. Each of these elements holds considerable weight in influencing investor sentiment and market valuation of the electric vehicle and clean energy company.

**Operating Profit Marginations Spark Investor Confidence**

Firstly, Tesla's operating profit margins have been a critical financial metric closely watched by investors. High operating margins typically indicate efficient management and potentially higher profitability per dollar of sales. Tesla has optimized its production processes over the years, notably through innovations in manufacturing technologies and supply chain management. These improvements have generally bolstered its operating margins, despite the global auto industry facing challenges such as supply chain disruptions and increased material costs. The continual enhancement in margins is seen as a testament to Tesla’s operational excellence and scalability - factors that are positively perceived by the markets.

**Affordability Issues Pose Challenges**

On the affordability front, Tesla has faced ongoing scrutiny. With the aim of mainstreaming electric vehicles, pricing remains a critical factor. Tesla has strategically adjusted prices across its range, with particular attention to markets such as China and the United States where competition in the electric vehicle sector is intensifying. While price cuts can potentially attract more customers, they can also compress margins and impact the overall profit figures. Balancing affordability while maintaining healthy profit levels is a delicate task for Tesla and is something that the market watches carefully.

**Impact of Full Self-Driving Software Updates**

The developments in Tesla’s full self-driving software also play a significant role. Innovations in this technology are key to Tesla's value proposition in the long term. Recent updates aimed at improving safety and functionality have kept consumer interest alive and underscored Tesla’s leading position in vehicle automation technology. However, the full self-driving technology is still not fully autonomous, operating at Level 2 autonomy where the driver needs to remain engaged with the vehicle. Regulatory scrutiny and the pace at which these technologies are approved and adopted can significantly impact investor expectations and Tesla's stock.

In summary, Tesla's stock continues to be dynamic, influenced heavily by its operational proficiency, strategies for making its cars more affordable, and the advancements in its autonomous driving technologies. Each of these aspects offers both opportunities and challenges for Tesla, shaping the narrative around its stock in a highly competitive and fast-evolving automotive landscape. As Tesla navigates these complex dynamics, the markets remain keenly tuned into how these factors will drive the company's future growth and investment attractiveness.