The sweep of 500 call options for Rivian Automotive at a strike price of $17.5 indicates increased trading activity and potential bullish sentiment among investors. However, it is uncertain whether this will have a significant impact on the stock price in the short term, as the stock is currently trading at $14.4881, below the strike price. The increased trading activity may lead to short-term volatility, but the overall impact on the stock price is uncertain.