It depends on how you define 'real'. If by real you mean inspired by actual events or economic situations, then yes. But if you expect it to be a verbatim account of a specific incident, it might not be.
I'm not sure specifically as there could be various novels with 'Black Monday' in the title. It might be about events that took place on a Black Monday, which could refer to a financial crisis like the one in 1987 when stock markets crashed globally. Or it could be a fictional story set on a Monday with a lot of chaos and misfortune in a more general sense.
Well, one Monday horror story could be missing the bus for an important job interview. I woke up late, rushed to the bus stop, but just as I got there, the bus drove away. I had to wait for the next one which made me arrive late and flustered at the interview.
Black Monday refers to October 19, 1987. On this day, stock markets around the world crashed. In the US, the Dow Jones Industrial Average dropped by a staggering 22.6% in a single day. One factor was the overvaluation of stocks in the preceding years. Program trading also played a role, where computer - generated trading algorithms exacerbated the selling pressure.
I'm not sure specifically what 'khooni Monday new stories' refer to as 'khooni' is not a common English term. It could be something very specific within a certain context, like a local event or a made - up concept. Without more information, it's hard to tell what the new stories are.