Intonation. He writes by thinking aloud (or in his head) how he says it. Usually we type simply by following grammar. But the way you read a sentence can imply different meanings or subtle emphasis what matters or "between the lines thingy". You can see TESLA being capitalize seems to hint he is a bit emotional whenever TESLA topic being brought up. As poster commented below, he should be capitalizing ORIGINAL given his observations of past price volatility. But instead, TESLA is consistently capitalized. I could be wrong if he intended to use the stock ticker name TSLA (perhaps the E is typo).