Aflac's 'Check for Cancer' Campaign Unveiled Amid 379th Trading Volume Rank

On September 8, 2025, , ranking 379th in market activity. The insurer launched its "Check for Cancer" national campaign, partnering with cancer survivor to promote early cancer screenings. , reinforcing the company’s brand alignment with health advocacy. This follows the recent Japan-based Miraito cancer insurance product launch, which has shown strong early adoption across distribution channels including banks and postal services.

Analysts highlight diverging valuation perspectives. , citing growth potential in supplemental health coverage for aging and younger demographics. However, risks persist from weak U.S. sales and declining Japanese premiums. , questioning whether growth is truly undervalued. , reflecting mixed investor sentiment on its strategic initiatives.

To run this back-test accurately I need to pin down a few practical details that aren’t fully specified yet: 1. Universe to rank • “All” U.S. listed stocks (NYSE + NASDAQ + AMEX) – about 6,000 names, heavy data pull • A predefined subset such as the Russell 3000 or the S&P 1500 – lighter and still representative • Something else (please specify) 2. Trade price convention • Buy at the same-day close and sell at next-day close (typical for end-of-day strategies) • Buy at next-day open and sell at next-day close (avoids look-ahead bias) • Another convention? 3. Rebalancing weight • Equal-weight the 500 names each day (default) • Volume-weighted or some other scheme? 4. Transaction costs / slippage • Ignore for now (default) • Apply a fixed cost (e.g., 2 bps per leg) – please specify Once we lock these in, I’ll fetch the necessary daily volume and price data, generate the daily top-500 lists, construct the one-day-hold portfolio returns, and feed them into the back-test engine for 2022-01-03 through today. Let me know your preferred settings and I’ll proceed.