Although fairly specific qualifying standards exist for grading all US coins, it is the INTERPRETATION of these standards by the grading services in a rising market that has led to "gradeflation". The major companies all use "market grading" which is a combination of both technical criteria for a given grade and what the numismatic market considers acceptable for that grade at a certain point in time. The market factor usually decides if a coin receives a higher or lower grade when submitted. If any service grades too conservatively, dealers and collectors won't submit their coins-too loosely and graded coins from that service will trade at discounted prices.
What does this all mean to you? Most high end MS64 US coins graded years ago have been cracked out of their slabs, resubmitted, and are now residing in MS66 holders. Many coins recently graded MS65 would have only rated a 63 designation in the past. Of course, all of this reshuffling has led to higher collector prices for basically the same coins!
Gradeflation is most present in commoner date slabbed coins retailing for less than $500 within the most popular US series (Morgan dollars and Walking Liberty halves, for example). A huge number of these exist and when the market for them turns downward you will be exposed to grade "deflation". In other words, the holder may STATE that the coin is MS65 but you will be very lucky in a weak market to be offered an MS63 bid for it if you are forced to sell.
How can you protect yourself? First, NEVER buy slabbed US coins sight unseen! Dealers don't-why should you? Many pieces offered in print ads and on the Internet are lower end "barely made it" coins. When looking at certified US coins in person, only select coins for your collection that are VERY high end for the stated grade and pass on the rest. Secondly, sharpen your grading skills to the point where you can comfortably buy MS63, MS64 and MS65 coins in their raw state (leave the MS66 and higher "super grades" to the experts). Once you start looking you will find that a number of old time dealers out there grade their material more conservatively than the services (especially in today's market).
"Aren't you suppossed to be out driving a truck or something jody?"
amrad78