Sandy Smith’s experience during the Great Recession reshaped her approach to finances. Her stepfather’s job loss forced her to support both her family and multiple households. This challenging situation led her to become highly prudent with her spending, a trait she initially adopted out of necessity.

Growing up in a family of Jamaican immigrants, frugality was always valued. To make her finances work, Sandy took extreme measures. She regularly used coupons, bought clothes from affordable stores like Walmart, and even used cardboard to patch up her shoes. For years, she avoided vacations while her friends traveled.

In 2008, Sandy launched a personal finance website, Yes I Am Cheap. “I embraced being cheap because I had to,” she explained, rejecting the negative connotations associated with the term.

Sandy also created a Facebook Messenger group for her friends, leading discussions on financial goals during an annual Zoom pajama party. She organized quarterly financial check-ins. Her persistence and advice helped her transition from $200,000 in debt to a net worth exceeding a million dollars. Now, even friends who once doubted her seek her counsel.

Sandy’s influence demonstrates the power of social networks in shaping financial behavior. Known as social contagion, this concept shows that one person’s habits can impact an entire group. For example, the National Bureau of Economic Research’s 2024 study highlights that having connections with high-income individuals increases the likelihood of saving and investing.

Professor Nicholas Christakis from Yale emphasizes that “no one should be surprised” by the impact of financial decisions within a social network. You are influenced not only by friends, but also by their friends, and even strangers connected to them. This ripple effect underscores the importance of a financially savvy social circle.