Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is there any algorithm to calculate highest possible return on stock market?
Highest possible is meaningless.  Ex: Use 17x Leverage on E-mini S&P 500 Futures, perfectly long before an uptick and short before a downtick every minute. Goes to the moon in a day of 1,440 minutes.  You are supposed to use a Buy-and-Hold SPY, with leverage that makes the Standard Deviation of SPY same as your Portfolio/Algorithm, as benchmark.