Bitfarms Ltd. (BITF) experienced a sharp reversal in its stock performance on Wednesday, plummeting 7.42% in after-hours trading. This significant downturn came on the heels of the company's announcement of a proposed offering of US$300 million in convertible senior notes.

The cryptocurrency mining company's stock took a hit as investors reacted to the news of the convertible notes offering. Such offerings are often viewed as potentially dilutive to existing shareholders, as the notes can be converted into equity at a future date. This prospect of increased share count and diluted ownership typically puts downward pressure on a company's stock price.

Interestingly, this after-hours plunge contrasts sharply with Bitfarms' performance earlier in the day. The stock had risen by 9.2% in premarket trading, reflecting the broader positive sentiment in crypto-related stocks at the time. However, the convertible notes announcement appears to have dramatically shifted investor sentiment, leading to the steep decline after regular trading hours.