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On September 23, 2025,
(RMD) saw a 0.44% increase in share price with trading volume reaching $0.20 billion, marking a 35.94% surge from the previous day. The stock ranked 487th in trading activity across the market. The move followed renewed focus on respiratory care demand amid evolving regulatory frameworks and supply chain adjustments in key markets.Recent developments highlighted by market participants include potential shifts in reimbursement policies for sleep apnea devices in the U.S. and Europe. Analysts noted that upcoming guidance from the American Academy of Sleep Medicine could influence product adoption rates, though no official statements have been released. Supply chain updates indicated improved component availability for CPAP devices, which may stabilize production timelines for the remainder of the fiscal year.
Backtesting parameters for evaluating high-volume stocks require defining a liquid universe of U.S.-listed securities with minimum price thresholds. A practical approach involves selecting 4,500–5,000 tickers from NYSE, NASDAQ, and AMEX with prior-month trading above $1.00. Position entry and exit would occur at daily closing prices, with transaction costs estimated at 1 basis point per round-trip trade to account for bid-ask spreads in large-cap instruments.

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