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Fair Isaac (FICO) surged 1.08% on October 1, 2025, with a trading volume of $360 million, ranking 348th among listed equities. The stock's performance followed a strategic recalibration in its credit scoring algorithm, which analysts suggest could enhance its market relevance amid evolving regulatory frameworks. Market participants noted increased institutional activity, though liquidity constraints limited further upward momentum.
Recent developments indicate a potential shift in the company's risk assessment methodology, aligning with global financial standards. This adjustment, if validated by third-party auditors, may bolster client retention in key markets. However, the absence of concrete guidance on implementation timelines has tempered immediate optimism among investors.
To ensure I back-test this strategy correctly, I need to pin down a couple of details that aren’t fully specified yet: Universe—Which exchange(s) should I rank stocks by trading volume—NYSE + NASDAQ, just NYSE, or another universe? Are ETFs included or only common stocks? Weighting & execution price—Do you want the 500 names held at equal weight, or weighted by something else (e.g., volume-proportional)? Should we assume buying at that day’s close and exiting at the next day’s close (i.e., “1-day holding period”), or another price (e.g., next-day open)? Benchmark (optional)—If you’d like the results compared with a benchmark index, please let me know which one (e.g., S&P 500, Russell 3000, etc.). Once I have this information I can lay out the data-gathering plan and run the back-test.

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