Chipotles 1.63 Stock Decline Amid Mixed Earnings Report Ranks 162nd in $640M Trading Volume
On October 7, 2025, Chipotle MexicanCMG-- Grill (CMG) closed at a 1.63% decline with a trading volume of $640 million, ranking 162nd in market activity. The stock’s performance followed a mixed earnings report highlighting margin pressures and a revised guidance range for same-store sales growth. Management attributed the downward revision to supply chain costs and shifting consumer spending patterns, though it maintained confidence in long-term unit economics.
Analysts noted the stock’s underperformance reflected broader concerns about discretionary spending amid tightening credit conditions. While the company reaffirmed its commitment to operational efficiency initiatives, short-term volatility persisted as investors weighed near-term challenges against its franchise expansion plans. The lack of immediate catalysts, such as new menu launches or regulatory updates, further limited near-term momentum.
To evaluate this strategy rigorously we need a bit more detail, because—unlike a single–ticker back-test—your idea involves building a new 500-stock portfolio every trading day. Could you clarify the following so I can structure the back-test properly (or tell you if we need a dedicated data service outside the current toolset)? 1. Market universe • U.S. listed equities only (NYSE + NASDAQ + AMEX), or a different universe? 2. Ranking method • “Top 500 by daily trading volume” – is that by dollar volume (price × shares) or by share volume? 3. Weighting & re-balancing • Equal-weight each of the 500 names each day? • Re-balance every trading day (i.e. sell yesterday’s basket at today’s open/close and buy the new basket)? 4. Execution assumptions • Entry price: today’s close or tomorrow’s open? • Exit price: next day’s close or next day’s open? • Any transaction costs/slippage to include? 5. Benchmark (if any) for comparison. Once I have these specifics I can confirm whether we can implement it with the current single-ticker back-testing tools or if we need an external data aggregation step.

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