Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why did I lose 2 cents more than the difference in the stock prices on my Robinhood trade?
There is a misunderstanding somewhere that your question didn't illuminate. You should have lost $0.04 as you say. Assuming the prices are correct the missing $0.02 aren't covered by a reasonable interpretations of the Robinhood fees schedule. For US-listed stocks: $0 plus SEC fees: 0.00221% of principal ($22.10 per $1,000,000 of principal) plus Trading Activity Fee: $0.000119/share rounded to nearest penny plus short/long term capital gains taxes The total fee rate is 0.002329% or 0.00002329*the price of the trade. With you trades totaling around $11, the fee would be ~0.000256 or ~1/40 of a penny.  The answer is probably that they charge $0.01 for any fraction of a penny. It's difficult to explain as anything other than avarice, so I won't try.