Dollar tumbles on parallel market sells at n501 from n525

It seems like you're referring to the current exchange rate of the US Dollar (USD) on the parallel market in Nigeria.

According to your statement, the USD is selling at N501 per dollar, which is a significant depreciation from its previous rate of N525 per dollar.

Here's a breakdown of the situation:

This depreciation could be attributed to various factors, such as:

It's essential to note that the parallel market rate can be volatile and may not reflect the official exchange rate. Additionally, trading on the parallel market carries risks, including the possibility of losses due to market fluctuations.

If you're considering exchanging currency, it's crucial to stay informed about the current rates and market conditions to make informed decisions.