Plus Grades - a little math problem

Discussion in 'US Coins Forum' started by halfcent1793, Nov 17, 2017.

  1. halfcent1793

    halfcent1793 Well-Known Member

    As of yesterday, PCGS' pop reports just under 270,000 1881-S Morgans. I picked this, because it is the most frequently slabbed variety of the most generic series so the numbers should be the least biased. Of all of those coins, only 3545 have been given a MS + grade.

    Let’s assume that PCGS gets the numerical grade of a MS Morgan exactly right about 97% of the time, a very generous assumption given that coin quality varies continuously and does not fall into discrete grade categories. But, the 3545 1881-S Morgans with a + grade represent only 1.3% of the Mint State population, a surprisingly small fraction IMHO. That means that the number of coins graded MS-64 that should be graded MS-65 is probably as large as the number graded MS-64+.

    It seems that you’d be better off selecting a coin you think is nice for the grade than paying a premium for the piece of paper with the marginally higher grade.

    Thoughts?
     
    Oldrdawg likes this.
  2. Avatar

    Guest User Guest



    to hide this ad.
  3. sakata

    sakata Devil's Advocate

    1.3% seems to be an extraordinarily high percentage if you ask me. Most people don't want to spend the extra money to grade them. I would expect that for most common coins the overwhelming majority (99%?) of those not melted are just sitting in collections or hoards, ungraded.
     
    Oldrdawg likes this.
  4. GDJMSP

    GDJMSP Numismatist Moderator

    You picked a bad coin to use as your example. I say that because the '81-S Morgan, along with a few of the other early S mint Morgans, is in a somewhat special category that very few coins fall into. That category is this - these coins are graded differently than other Morgans are graded. These coins are graded using a more strict set of grading standards than other Morgans are graded with.

    As for the comparison you're trying to make between the plus grades and regular grades - well that doesn't really work either. I say that for a couple of different reasons. 1 - plus grades have only even existed for a few years. Prior to that there was no such thing as a plus grade. So there is no way to fairly compare the number of plus grades to the number of regular grades. And that applies to all coins, not just the '81-S Morgans. 2nd reason - the TPGs have changed their grading standards several times since 2004. And since they have changed their grading standards this means not all coins have been graded equally. For example, coins that were graded as AU prior to 2004 are today graded as MS. And today, just about all coins have jumped 2, 3, or even 4 grades from what they would have been graded before 2004.

    Given those two things you simply can't make comparisons like the ones you are trying to make.
     
    Oldrdawg and cpm9ball like this.
  5. Jaelus

    Jaelus The Hungarian Antiquarian Supporter

    Not for this coin, but you could instead select a coin that was added to the catalog after they started using + grades.
     
    Oldrdawg likes this.
  6. cpm9ball

    cpm9ball CANNOT RE-MEMBER

    FWIW, if I had my choice between a plus (+) grade, say MS64+, and a straight grade of MS65, I'd rather have the straight grade!

    Chris
     
    green18 and Oldrdawg like this.
  7. kookoox10

    kookoox10 ANA #3168546

    I agree with Chris, I would take a straight graded 65 any day. The lessor grade with the + just seems like too much of a consolation prize to me. Now the graders were being too nitpicky on that one.
     
    green18 and Oldrdawg like this.
  8. messydesk

    messydesk Well-Known Member

    Thought 1: You can't count the number of 81-S dollars graded before the invention of the + grade.

    Thought 2: Bulk submissions, which probably account for a huge amount of 81-S coins graded 65 and lower, almost never get + grades.

    Thought 3: You're always better off cherrypicking for quality than relying on the label, if you know what you're doing.
     
    Evom777, cpm9ball and Oldrdawg like this.
  9. halfcent1793

    halfcent1793 Well-Known Member

    That was my point.
     
    Jaelus and Oldrdawg like this.
  10. GDJMSP

    GDJMSP Numismatist Moderator

    Yup, I'll give ya that :)
     
  11. Oldrdawg

    Oldrdawg Active Member

    I think we would all prefer a straight MS65 than an MS64+, but all things being equal (including price and quality) I think most of us would prefer a 64+ to a straight 64 -- even if it's just for the sake of future resale. But picking the coin and not the holder is obviously and absolutely the way to go. The only time I've added a "+" to my collection is when there was no premium accompanying it.
     
  12. Santinidollar

    Santinidollar Supporter! Supporter

    Amen.
     
  13. baseball21

    baseball21 Well-Known Member

    In today's market where quality for the grade is everything not necessarily. If the 64+ got a CAC I would take the + CAC over a next grade up without either.
     
    Oldrdawg likes this.
  14. TheFinn

    TheFinn Well-Known Member

    I'd rather have TWO MS64+ than ONE MS65 any day.
     
    TypeCoin971793, wxcoin and Oldrdawg like this.
  15. green18

    green18 Unknown member Sweet on Commemorative Coins Supporter

    Amen........
     
    Oldrdawg likes this.
  16. cpm9ball

    cpm9ball CANNOT RE-MEMBER

    If you want to put it that way, I'd rather have a 1933 St. Gaudens Double Eagle that I could take out of the country to sell.

    Chris
     
    baseball21 and green18 like this.
  17. GDJMSP

    GDJMSP Numismatist Moderator

    Wellllllllll - as long as you're talking about what "you'd rather have" - I'd rather have an honest 65 than what passes for a 65 with the TPGs ;)
     
  18. baseball21

    baseball21 Well-Known Member

    I'd rather have the 450 mil painting, then I could re-auction that and get pretty much all the coins I want
     
    Oldrdawg likes this.
  19. Conder101

    Conder101 Numismatist

    Well the only way to have that would have been to have bought it for 450 million (so why didn't you buy the coins instead of the painting?), so then if you resold it right away it would probably end up going to the underbidder from the first sale for LESS and the 450 Mill you paid. So that would mean less money to buy the coins.
     
    Oldrdawg likes this.
  20. Oldrdawg

    Oldrdawg Active Member

    Oh, then what you actually want is an MS66!
     
    TypeCoin971793 likes this.
  21. TypeCoin971793

    TypeCoin971793 Just a random guy on the internet

    What I do is say "Screw the ugly plastic tomb!" and buy pretty coins I like, regardless of grade or certified status.
     
    green18 likes this.
Draft saved Draft deleted

Share This Page