. >> humphrey yang is a personal finance content creator. bought a one ounce piece of gold from costco. >> i think this gold bar will hold its value, so i don't really think i spent 23.59. i more just converted one currency to another. >> it was a good bet. humphrey's investment gaining close to $300 in the last six months, according to yahoo finance, out of 101 stores across 46 states that received new stock of the gold bars, 77% of them sold out in the first week of october. >> when you think about costco's merchandizing strategy, i think you have to give a lot of credit to the merchant team for just continuing to find items that their members want and value. >> wells fargo estimating earlier this year that costco was generating up to $200 million a month in gold sales. >> so the idea is that this is a safe place to store your money, where you're going to be able to protect your wealth. and we have seen this all the way back to the roman empire, where gold was this tangible value, where you could put your money into it and you knew that it

. >> reporter: humphrey yang is a personal finance content creator.t a one ounce piece of gold from costco. >> i think lit hold its value. i don't think i spent $2,369. i more just converted one currency into another. >> reporter: it hasn't just held its value. as of friday the value of an ounce of gold soared to $2667 up a staggering 44% in the past year. >> consumers are able to do their research and see the prices for these precious metals on the exchanges and see what kind of value they are getting from the retailers. >> these are not guaranteed investments. the price of precious metals can fluctuate. there can be fees when you try to sell them. as with any investment, research early. >> robin: can't just take it to the bank? >> no. you could go to the bank if you want to. >> robin: okay. all right. >> rebecca: kind of like the milk in the back of the store. they're driving traffic into costco stores with these sales. >> it seems that way, more and more. >> rebecca: thank you, trevor. appreciate it. coming up next, black friday in october is here.