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The insider-sentiment sell/buy ratios from Vickers Stock Research are bullish when they are under 2.00, neutral from 2.00 until 6.00, and bearish over 6.00. Two weeks ago, the Nasdaq One-Week Sell/Buy Ratio jumped to an eye-popping 15.57; last week it relatively calmed to 6.89 (still bearish); and this week it has popped again, to 14.06. Transaction volume is very low due to trading restrictions in place during earnings season, and insiders may be taking profits now -- some 16 months before they will have to pay capital-gains tax. But at the end of the day, those who are trading on the Nasdaq are mostly selling. Meanwhile, the one-week ratio on the NYSE is also heating up, at 7.95 this week. Would we run for the exits based on all of this? No. But this is a reminder that with many indices at all-time highs, stocks are vulnerable to even the hint of bad or unexpected news (such as the DeepSeek drama playing out today). Reviewing portfolios to reflect risk and volatility is always a good idea. On a sector basis, insider buying was the greatest in the Energy sector over the past week, although selling still outpaced buying. Selling was the greatest in the Healthcare and Financial sectors. This week, analysts at Vickers highlighted insider transactions of interest at Tempus AI Inc. (NGS: TEM) and Morgan Stanley (NYSE: MS).

Alcoa Corp. is a global provider of bauxite, alumina, and aluminum products. The company is based in Pittsburgh and has approximately 13,600 employees. The shares are a component of the S&P MidCap 400 Index.

The Vickers Top Insider Picks is a daily report that utilizes a proprietary algorithm to identify 25 companies with compelling insider purchase histories based on transactions over the past three months.

Ecolab produces and markets cleaning and sanitation products for the industrial manufacturing, hospitality, healthcare, and life sciences markets. The firm is the global market share leader in this category with a wide array of products and services, including dish and laundry washing systems, pest control, and infection control products. Additionally, Ecolab sells customized water management solutions across its end markets. The company has a strong hold on the US market and is growing its presence abroad.