[smabie]

Sure they are. If the price you calculated and the price in the market is significantly different, the law of no arbitrage is violated and therefore you have can fulfill your sworn duty as a market participant and arbitrage it away until everything is hunkydory again.

[infinite8s]

Thats also the reason why the market can never go to 100% passively managed money.

[xorfish]

yes, but 99% is possible.

[smabie]

Possible, but would negatively affect liquidity and increase volatility. Trading would become more expensive as well.