No price changes also usually implies no hidden commodity price risk in a company, which is attractive to both a lender and a private equity investor. (inc.com)
One thing they do achieve is to manage pricing risk, and the rapid and often steep swings in wholesale electricity prices. (reneweconomy.com.au)
That doesn't mean they can predict the future, it just means that they are pricing the risk with good information. (money.stackexchange.com)