Both words 'marketplace' and 'exchange' are being used so that might confuse people. Obviously I don't expect it to look like a stock exchange with bid/ask but

Both words 'marketplace' and 'exchange' are being used so that might confuse people. Obviously I don't expect it to look like a stock exchange with bid/ask but one of the ideas of having the marketplace was that competing healthcare providers would (maybe) lower premiums. That means there must be a mechanism for updated prices appearing on the websites. Are prices updated on a daily, weekly, monthly or quarterly schedule? It would be interesting after a year to see whether prices really do fluctuate or not, and what the variance from the mean is. Is this a free market where health providers really do compete on price, or is this a stitch-up like e-book prices?