Which average (am or pm) does the Mint use to determine prices?

Nooker

I'll start a new thread on this because my other weekly status probably won't get the traffic, and I really need to know the answer:

the price for a Platinum proof did NOT go up this week as I had expected it would. Last week's London PM close prices:

Thu 1/10 - $1621
Fri 1/11 - $1626
Mon 1/14 - $1658
Tues 1/15 - $1690
Wed 1/16 - $1678

my math says that's a $1654.60 average, and a Wed close of $1678 together says it's a Criteria 2, which says it should increase, which puts it in the $1992 Mint Price range.

Mint Pricing Guide

HOWEVER, if I use the London AM close numbers,
$1613
$1626
$1640
$1697
$1660

the average is $1647.20, which would NOT cause a price increase (Criteria 4, since the Wed PM close was in the next range)

All along I've assumed that they use the PM close numbers for their weekly average, since they use the PM number for the Wed close price, but maybe they use the AM numbers for the weekly average. Their pricing guide does not mention which they use. I've called the Mint, and Customer Service doesn't know.

I would have to go back and do a lot of data analysis to see if there was ever another situation like this where the AM average is in a different range than the PM average.

Mark

Nooker

aha, I may have found the answer. On the "mintnewsblog.com" web site, (who writes that btw, it's really good!), there was an article posted back a while;
MintNewsBlog

In this article, he states that the AM close numbers are used for the weekly average.

I guess I've been using the wrong numbers for over a year. Looking back though, it hasn't changed any results other than this week.

Today, I learned something new


Mark