SoFi stock rallies as the fintech reports a strong Q2 and raised guidance for the full year. Investors are still recommended practicing caution in buying SOFI shares.

So Q2 went well, and SoFi seems well established in its role as a profitable online banker at this point. On the other hand, its stock price has nearly tripled over the past year. That's great for existing shareholders, but new investors may be wondering if SoFi now costs too much.

SoFi Technologies shares are jumping 16% in intraday trading Tuesday after the personal finance tech firm posted better-than-estimated results and boosted its revenue and earnings outlook.