Unless there's a cartel operating, I assume it's being driven by supply and demand and, like it or not, in the absence of price controls companies are always going to maximise what they can charge.
I'd also have assumed that it was being driven by the current AI boom, but that's been going on for years now, and even if it's been ramping up in the past few months, it doesn't explain the abrupt price increase of DDR5 in the past few weeks.
Is it an indirect consequence of recent moves to reduce or discontinue production of DDR4 which pushed prices of *that* up? I can't see why, since anyone trying to snap up the remaining supplies of DDR4 for older equipment isn't going to be able to use DDR5 instead- that's kind of the point, after all.
As for Corsair DDR5 I bought, I checked Scan's price- via the Wayback Machine- from the end of last year, which was £104, i.e. slightly lower than it was when I bought it. So that implied that it had gone *up* very slightly during a period you'd otherwise have expected it to have fallen as DDR5 lost its "new" technology premium and became the new mainstream. This suggests that AI-driven demand had already had an effect. At any rate, I didn't think £110 for 32GB seemed *that* cheap at the time, but it looks like an incredible bargain now.
RAM is one of those things which has always been notorious for price volatility. (*) I'm guessing because the technology is constantly changing, the level of investment required is high and because the need continuous production that forces can't always match with spikes and slumps in demand.
Presumably, even if the manufacturers wanted to take advantage of an increase in demand like this- and, ironically, flatten out the spike, which is how the "invisible hand" of the market is *supposed* to work- they wouldn't be able to do so overnight.
And, more importantly, another reason they'd be wary about rushing in to do so is that they're as paranoid as everyone else that the AI bubble is about to burst, demand from that sector would collapse and they'd be left with a huge excess of stock and/or production capacity which would no doubt exacerbate the resultant price crash.
(*) This article covers an earlier spike in 1988 and notes that:-
> "By July of 1988, the increasing RAM prices, which had slowly crept up in the early parts of the year, surged. A megabyte of RAM, according to John C. McCallum’s price analysis, had surged in price from $199 to $505 in a single month, and the cost of a 256k DRAM chip had surged from $2.95 at the beginning of 1988 to $12.45—a price level maintained for nearly a year."